SCIENCE 7_Q1_PERIODIC TEST

Quiz by CID Marikina

Science

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50 questions
• Q1

A group of students was asked to investigate how fast powdered juice dissolves in cold and in hot water. Which step shows the scientific investigation?

Mix 1 tablespoon of powdered juice in a glass of water.

Name the different brands of powdered juice in a glass of cold water.

Observe and record how fast a 5g of powdered juice dissolves in 50 ml of hot and cold water.
Conduct an experiment to find out if the temperature affects the rate of dissolving powdered juice in water.
30s
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• Q2

Which of the following is a part of the scientific process

Drawing a conclusion without conducting an experiment.
Comparing the results of the experiments.
Formulating and testing the hypothesis.
Conducting experiments to test the hypothesis and draw a conclusion.
30s
• Q3

Ana wanted to find out if vinegar will remove the stain on the shirt. What variable should she keep constant in her experiment?

The acidity of vinegar shows the effects of concentration on the shirt.

The brand of the vinegar shows how effective it is in removing stains on the shirt.

The amount of vinegar that shows how much stain will be removed on the shirt.
Equal amounts of vinegar with different concentrations will show reactions on the shirt.
30s
• Q4

When you are listening to the warbling of the birds on a tree, you are making an observation. Which shows the difference between types of observation?

The birds are biotic, and the tree is abiotic.
There are three birds flying on top of a tree.
Some birds have attractive colors, differ in size, produce pleasant sounds and they can fly in groups or flock.
Maya is a small bird with a red patch and occupies a fraction of its former range due to habitat loss and increasing temperatures.
30s
• Q5

You noticed that a certain part of the garden is covered in shade and the other part of the garden is exposed to sunlight. You also noticed that the plants in the shaded area have yellow leaves and are shorter in height. What is the best hypothesis in the situation?

Plants need sunlight to grow healthy.

Plants need oxygen to become tall.

Plants should be exposed to sunlight to get enough energy.
Plants need enough sunlight to perform photosynthesis, thus, plants become healthy
30s
• Q6

A group of students wanted to find out whether the mass of an object affects how fast it falls. They performed an experiment and released some marbles together from the same height.

The heavier the object, the faster it will fall.
They will fall on the ground.
The mass of the object does not affect the time it falls from the same height.
The mass of an object has no effect on the rate at which it falls since objects of different masses took the same time to drop.
30s
• Q7

Sodium chloride known as table salt is added to food to enhance its flavor and also used as preservatives to extend the shelf life of food. Which statement BEST describes the composition of the substance?

Sodium chloride is a mixture of solid, liquid and gas.
Sodium chloride is formed from a combination of elements.
Sodium chloride is a by- product of chemical reactions that cannot be separated by physical means.
Sodium chloride is a compound of Sodium and Chlorine and has different properties from the elements.
30s
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• Q8

Carbon is an element with a symbol of C and atomic number of 6. What else can be inferred from the given statement?

Carbon is a gaseous matter.
Carbon can be found in the periodic table.
Carbon is in simplest form and only made up of a single atom.
Carbon is a pure substance containing only one kind of atom that cannot be broken into parts.
30s
• Q9

Chemical symbols are used to represent different elements. How do we write the chemical symbol of an element?

Using the first letter of the name of the famous inventor.
Using the first and second letter of the name of the discoverer.
Using the letters of the place or location of discovery.
Using the letters of the name of the scientists, place of discovery and the Latin name of the element.
30s
• Q10

Which of the following sets of elements was named using its Latin word?

Aluminum, Carbon, Helium, Oxygen
Calcium, Copper, Nitrogen, Zinc
Gold, Mercury, and Sodium were known elements in ancient times
30s
• Q11

Which of the following groups of elements consist of metallic elements?

Elements like oxygen, sulfur, and carbon are pure metals.
Elements like carbon, iodine, and aluminum are metalloids.
Some elements like silver, copper, and gold are known metallic substances.
Some elements like copper, iron, and aluminum are metallic because they are good conductors of heat and electricity.
30s
• Q12

An element doesn't break apart but forms thin sheets when pounded with a hammer. It also conducts electricity very well. The element is most likely a ___.

ductile material.
solid hard material.
malleable or can be hammered into thin sheets without breaking.
metallic element like Gold which can be hammered into very fine sheets.
30s
• Q13

How do you describe a solution when a blue litmus paper is dipped into it and its color remains blue?

It is an acid with a pH less than 7.
It is a base with pH greater than 7.
It is either basic or neutral in nature with pH 7 .
It is either slightly or strongly basic with a pH ranging from 8-14 and since the pH is high,the concentration of hydrogen ions in the solution is low.
30s
• Q14

How will you compare Copper and Iodine based on their properties?

Copper and Iodine are both classified as elements.

Copper and Iodine are examples of compounds.

Copper can be drawn into wires. Iodine is a non-metal.
Copper is a metallic element therefore it is a conductor, whereas Iodine is an insulator.
30s
• Q15

Foods are made up of elements and the nutrients in foods are in the form of minerals. How do elements in food play an important role in the human body?

Calcium, Iron, and Mercury are essential elements for the body to function well.

Sodium keeps the nerves and muscles working properly while Calcium maintains the bones and teeth.

Elements such as Iodine, Magnesium, and Calcium are essentials for a healthy mind and body.

You need to eat healthy foods because the body needs essential elements to keep you healthy and to be able to perform your daily activities.

30s

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