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Grade 4-6 NST Olympiad 2022
Quiz by Padiso Chaka
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
Pretoria, at the same time, over the past few days. Four-day temperature recordings at 12h00
Day Temperature (°C)
Tuesday 22 Wednesday 26
Thursday 29
Friday 23
On which day could the air have had the most water vapour at 12h00?
The Earth orbits the Sun once ...
In an experiment in the class, the teacher boiled 100ml of water in a beaker. Then turned off the heat source and added five ice cubes to the beaker. Which of these thermometers shows what the temperature most likely happened to the temperature after 10 minutes? (Look at the picture from the document I sent)
What is the primary source of energy for life on Earth?
The 5 beakers represent water in different forms or phases. Select the beakers in the correct order to show what happens when the solid is heated until all the liquid form evaporates and boils away. (Look at the picture from the document sent to you)
The Sun, Moon and stars all seem to rise in the East and set in the West about 12 hours later. The best explanation is that…
Thabo’s family has a long history of people who developed diabetes. Which lifestyle change should she make to try to prevent becoming diabetic?
The most important biochemical reaction on Earth is...
Tom wants to build a racetrack that will allow his toy cars to travel fast when force is applied. Which material should he use?
The Sun is a star – but what is a star?
A magnet is placed near a pile of steel paper clips. Which will most likely occur?
Too much sugar is not desirable in the diet because...
You need to fit a metal rod into a hole in a metal cylinder. It fits too tight.
Which would be the best strategy to make the rod fit
Our Solar System contains…
Due east from Australia is a marine wonder, that can be seen from space. This area has an abundance of marine plant and animal life.
What is this area called?
Photosynthesis…
A manufacturer is conducting research using a hammock, they want to sell to customers. The manufacturer places different amounts of mass on the hammock and observe what happens to the hammock.
Which feature of the hammock is the manufacturer likely testing?
This photograph shows …
Modern trains rely on magnetism for a fast and smooth ride. Which of the following combinations would assist in the movement of these trains?
Chemical potential energy is stored in fuels like...
Which one of the following contributes mostly to pollution of our scarce water resources?
Where does the Moon get the light that it shines down onto the Earth?
In which beaker will the most solute dissolve to form a saturated solution?
Sound is caused by...
South Africa is one of many countries where limestone solutions crystalize and form columns, stalactites and stalagmites. Where does this normally occur in nature?
At various times different amounts of the Moon may be visible from Earth (as in this photograph showing “Last Quarter”).
The changing appearance of the Moon is caused by…
Sometimes solids, like ice, change directly into a gas, without turning into a liquid first. What is this process called?
A high-pitched sound (like a female singer) ...
Gas is a phase of matter. A characteristic of gas is that it takes the shape of the container in which it is stored. Why it is that gas in a container sounds like liquid when the container is shaken?
How many astronauts have actually walked on the surface of the Moon? The first two astronauts who walked on the Moon were the Apollo 11 crew in1969. The last two astronauts who walked on the Moon were the Apollo 17 crew.in 1972. The Apollo 13 mission never landed because there was a problem.
Animals that only eat butterflies, beetles, ants, and mosquitoes are called?
Which of the test tubes will have the highest pitched sound and which will have the lowest pitched sound when tapped with the pencil?
The Fynbos ecosystem has a huge biodiversity of plants and animals. Here plants produce seeds that can only germinate once they have been scorched by fire. The Protea variants forms part of this Fynbos. Where in South Africa is fynbos mostly found?
Why do astronauts have to wear spacesuits when walking around on the Moon?
This is Steven. He is not as developed physically as some of his friends of the same age. He lacks Vitamin D resulting in distortion of his bones.
He could be suffering from…
This diagram shows the “Fire Triangle”. This helps us to understand that fires can be extinguished by … (choose the best answer)
Green plants produce their own food. What do they need to make their own food?
Why did New Horizons, the NASA Space Probe launched in 2006 take nine years to get to Pluto, arriving only in 2015 even though, at an average of 58500 km/h it was the fastest space probe that has ever been launched?
When vinegar and bicarb is combined in a beaker the gas formed can be used to extinguish flames. Which gas is formed when these substances are combined?
Energy can neither be created nor destroyed, but it can be converted from one form of energy to another. When a taxi is parked with the engine running, most of the chemical energy released when the fuel burned in the engine is not used to move the vehicle. What is most of the chemical energy changed to?
Which one of the following represents examples of vertebrates?
Why do you think that a wild polar bear will never see a wild penguin?
What type of skeleton does a jellyfish have?
This diagram shows an energy sequence: chemical>Heat >mechanical energy
In which of these cases can this energy sequence explain what is happening?
The smallest bones in the human body are the ……
What causes day and night?
An athlete goes to the gym to get bigger arms. Which muscles is he likely to exercise?
Pollution is leading to climate change. What is predicted to be a probable result of climate change for South Africa?
On 27 April every year, South Africans celebrate Freedom Day. This day is also known as “National Braai Day”. Wood is burned to cook a variety of meat. When the wood is burned, they turn into coals then ash.
What change is the burning of wood an example of?
What is the name of the huge radio telescope being built in the Northern Cape?
Which one of the questions below, can be answered by the following experiments?
One of the main causes of acid rain is …
During a certain stage of a butterfly lifecycle, the butterfly helps plants to pollinate their flowers. At other stages, it hurts plants by eating its leaves
At which stage in the butterfly’s life cycle does it eat the most plant leaves?
This diagram represents a cross-section through the Earth, showing the three main layers.
Which of the layers is the hottest?
The diagram below shows two flowers from the same plant.
Which of the arrow(s) show pollination taking place?
Which of the following is not an example of a fossil fuel?
Study the pictures on the right and choose what part of the flower marked A to D is similar in function to the tree trunk
Look at this map showing the Atlantic Ocean and the continents on either side of it.
The fact that the Western Coastline of Africa obviously fits onto the Eastern Coastline of South America led Scientists like Alfred Wegener to propose…
A tree has one light ring and one dark ring to make up one year’s growth. How many years of growth are shown in the
The burning of fossil fuel like coal to produce electricity has caused an increase in the amount of ___?___ in the atmosphere.
This is a flowering plant. If all the flowers are removed, the plant will not be able to…
This photograph of “petrified wood” is clearly showing the ‘tree rings’ of an ancient tree now fossilised to become stone. This must have happened because…
Which two life processes occur both in humans and plants?
The diagram show two catapults X and Y, each loaded with a marble.
The marble is being pulled back by different amounts. Which one of the following statements is true?
The products listed below, comes from the same source. What is the source?
This photograph taken in the Karoo shows a “glacial pavement” polished smooth by an ice sheet. The scratches were made by small rocks embedded in the ice and show the direction in which the ice sheet moved.
Which one of the following statements is false?
Which one of these is not a plant?
The best electrical conductors, in order, are…
Plants produce their own food with the help of sunlight. Where in the ocean would the producers flourish?
Study the marine food web in question 69. What will happen if the apex predator dies out?
66 million years ago many species, including the large dinosaurs, went extinct when …
Why are there so few hydroelectric power stations in South Africa?
Early pre-humans known as Homo erectus were the first to use fire for warmth and for cooking. Evidence was found at Swartkrans near Sterkfontein, dating back 1 million years. The main advantage of cooking meat is that…
The diagrams show a flashlight and three arrangements of the torch cells. In order to make the flashlight work, the cells need to be inserted as in…
Sethu has four bottles. She wanted to know which bottle could hold the most water. Sethu determined the mass of each empty bottle. She then measured the mass of each bottle filled with water. She recorded the following results:
Which bottle held the most water?
The ‘Cradle of Humankind’ near Krugersdorp in Gauteng has many important prehuman fossils of ancestral species including…
The Zulu basket is a rigid bulb-shaped container rendered watertight by the tightness of the coilweave. Every basket is made by hand, using indigenous raw materials.
What is likely to be stored in these baskets?
The following diagrams show an electrochemical cell and a Lamp connected by wires to items made of various materials.
1 = steel bolt. 2=wooden ruler. 3=brass key. 4=plastic spoon Which of the lamps will light up?
Below is a picture of a dolos. It was designed by a South African to drastically reduce sea erosion off the East London coast. A dolos can weigh up to 8 tons.
Look at the shape and give a reason why this shape would reduce the power of waves around the coastline
The Moon is the main factor causing ocean tides on Earth. What causes “Spring tides?
A substance goes through the four changes of state, A, B, C and D. In which of the four processes is there heat gain?
This diagram shows a model of the very first “battery” invented in 1779 by an Italian scientist named Alessandro Volta.
It works because …
Substance X was in its solid state and was heated continuously over a flame. The changes in the temperature of substance X was recorded in the graph below.
At which point did substance X start to boil?
The Sun is an example of …
The diagram below represents part of the water cycle.Which of the following processes correctly represents X and Y?
This is a “battery” made of six lemons connected in series. It works because it uses metal electrodes made of two different metals (iron & copper). The reading on the voltmeter is 5.3 volts.
What voltage does each lemon give to this battery?
Jim placed a glass of cold milk on a table in the kitchen at room temperature.
Which of the following would he observe in the next 20 minutes?
Which of the following is an important factor in explaining why the Earth has seasons (spring, summer, autumn, winter)
Linda filled four containers A, B, C and D, made of the same material but of different sizes and shapes with 300 ml of water each. She placed the containers out in an open field. After 3 hours, she recorded the volume of the water left in each container in the bar graph below.
Identify containers A, B, C and D below.
These three photographs show different power suppliers that all use renewable energy sources.
Which one of these Renewable Energy Sources produces direct current?
Ryno observe four materials: W, X, Y and Z, and came up with the flowchart below.
Based on the flowchart above, which material W, X, Y and Z is used to make the shopping bag to carry groceries as shown below?
Look at the data given in the table below. Answer the question that follows.
Which of the following reasons best explains why Venus is hotter than Mercury?
The picture shows an organism with big eyespots on its body as part of adaptation. These big eyespots look like the eyes of a larger animal.Which of the following is correct about the organisms’ adaptation?
The photograph below shows an Eskom transformer that has been illegally connected using uninsulated wires – even barbed wire cut from a fence. 22000 volts comes into the transformer, nobody knows the exact voltage being given to the poor consumer receiving this stolen power, risking lives, TV’s and homes. Such connections are often made during times when load shedding is active.
Why should this be considered a crime?
The prefix “nano” comes from the Greek word meaning dwarf.This condiment has the nanostructure of its lipids and proteins. They are combined into an emulsion as little droplets that are only a few hundred nanometers in size. So it does not taste like eggs, oil or water. It is the interaction of the droplets' nanostructure, achieved through whipping and heating, that contributes to the taste and texture of the condiment. Which condiment is the text refering to?
Where in South Africa are most of our optical telescopes based?
The diagram represents the set-up for a distillation process. Distillation is used to purify and extract/separate components from a mixture.
Which one of the following represents the order of the stages in the distillation process?
The table below show the state of 4 substances E, F, G and H at different temperatures.
Based on the table above, which substance has the lowest boiling point?
Tercia hung three identical towels `P, Q and R, to dry on a sunny and windy day.The towels were equally wet and had the same mass when she hung it.
Tercia measured the mass of the towels after an hour. Which towel has the lowest mass?
Students are testing their reaction time by catching a dropped ruler. The distance the ruler fell before being caught between their fingers was recorded on the table below. Use the table to answer the following questions.
What would your estimate be for the reaction time of a student who caught the ruler at 12cm?