
RDA Science
Quiz by EVANGELINE PASCUAL
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
Your mother planted monggo seeds separately in cans. She used a different amount of fertilizer in germinating the seeds. The volume of each liquid is the same, and exposure to light was moderate. She found out that the monggo seeds germinated at different time. What is the independent variable in the set up?
You observe that the iron grills in your gate become rusty after the rain. You wonder why they become rusty. Which step in the scientific method is involved?
For questions 3-4. You were tasked by your teacher to investigate howfast crushed salt dissolves in cold and hot water.
Observing the fair testing, what will be your controlled variables?
I. method of stirring
II. time each solution is stirred
III. amount of water in each cup
IV. time the solid is added to water
V. amount of crushed salt in each cup
For questions 3-4. You were tasked by your teacher to investigate how fast crushed salt dissolves in cold and hot water.
Which variable is being measured in your investigation?
Sodium chloride (NaCl), a combination of sodium(Na) and chlorine (Cl), is dissolved in water. After several days, the water evaporated, leaving the salt in the container. How will you classify the salt?
Which of the following statements is NOT TRUE?
Which of the following statements best describes the similarity between elements and compounds?
You are curious if sulfur can conduct electricity. You tested it by dissolving the sulfur in the water and immersing the prongs of an electric conductor. The device did not produce any sound. How will you classify sulfur?
A. compound
B. metal
C. metalloid
D. non-metal
Which of the following statements is TRUE about elements and compounds?
Humans and animals absorb oxygen (O2)from the air they breathe in and release carbon dioxide (CO2).Carbon dioxide (CO2) is a/an________________.
Your sister has an unopened box of a 40-meterfoil labeled 100% made of aluminum. Aluminum is a pure substance. She takes just a thumb size piece of aluminum foil. Which of the following statements is TRUE about the piece of aluminum foil your sister took compared with the rest left in the box?
Compounds are different from mixtures because________________.
You were tasked by your teacher to check if the liquid sample you have is a substance or a mixture. Which of these tests will you use?
I. color comparison III. boiling point test
II. taste comparison IV. melting pointtest
A liquid has the following properties: one phase, colorless, and varying boiling points. Which of the following BEST describes the liquid?
1. Given the following data, which of the solid samples are probably the SAME substances?
Sample Color Mass ( g ) Melting Point (0C) Density(g/mL)
Solid 1 Gray 16 120 3.2
Solid 2 Brown 18 115 3.2
Solid 3 Black 17 130 2.5
When all parts of a mixture have a uniform appearance and the same properties, it is homogeneous. Solutions are homogeneous mixtures. Which of the following is NOT homogeneous?
Your mother asked you to heat a liquid in a pan. You forgot to immediately switch off the stove, and all of the liquid had evaporated. However, you saw that some solid materials had accumulated on the pan's surface. What conclusion can you draw from your observation?
Water boils at 100 oC and pure ethanol at 78 oC. Which of the following statements concerning water and ethanol is/are correct?
I. Water and ethanol are both pure substances.
II. Water and ethanol can be boiled at either100 oC or 78 oC.
III. Water and ethanol have specific temperaturesat which they would start to boil.
IV. Water and ethanol can be identified according to the temperature at which they boil.
In a saturated solution, which of these actions will cause more solute to dissolve?
A solution can still dissolve more solute. What type of solution is it?
Your sister prepared juice for your visitors. You observed that some juice particles were not dissolved. How will you describe the juice prepared by your sister in terms of saturation?
Using the data below, in which step is thesolution described as saturated?
STEP TOTAL AMOUNT OF SUGAR ADDED OBSERVATIONS AFTER STIRRING
1 6 grams salt completely dissolved
2 12 grams salt completely dissolved
3 18 grams salt completely dissolved
4 24 grams Some sugar is seen at the bottom of the container.
Which of the following is less concentrated?
In your Science 7 class, you prepared a solution by mixing 50 g of salt in 100 g of water.
What are the concentrations of the solute and solvent in percent by mass?
You prepared a solution containing 9% of sodium chloride (NaCl). How will you describe your solution?
Rene needs to raise the stage of the microscope to focus the specimen he is studying using the LPO. Which part should he manipulate?
After the sample specimen is placed over the slide, a cover slip is put on top of the sample.
How does cover slip work?
The circle below represents the field of view of the microscope. The square represents the plant cell being viewed and the star represents the center, how will you move the slide?
Which of the following is the correct order for the five levels of organization in the human body, from the most to least complex?
The organ systems of plants consist of the root and shoot systems. What is the function of the root system?
Which of the following organs DOES NOT match the system?
An animal cell is viewed using a 15X eyepiece and a 40X HPO. How much will the cell be magnified?
You are to transfer the microscope to the next room. Which parts should you be holding in carrying it properly?
The plants need abiotic components for existence. The following are examples of abiotic components EXCEPT
What kind of symbiotic relationship is exhibited when a bee hops from one flower to another?
Which of the following correctly describes the relationship between an orchid and a tree?
Chlorophyll helps plants to produce food through the process of photosynthesis. Which of the following organelles contains chlorophyll?
Why are bacteria and fungi important in the environment?
Which of the following statements differentiates asexual reproduction from sexual reproduction?
Why is it that only a small amount of energy stored in food is transferred to the next organism in a food chain?
Which of the following statements is TRUE?
The table below shows a comparison between three kinds of cells. Which two cells could possibly have come from the same organism?
Part of the cell Cell 1 Cell 2 Cell 3
Nucleus / / /
Chloroplast / X /
Cell Membrane / / /
Centriole X / X
A farmer grew only one type of corn. All the corn plants died from the same disease. What can be said in this corn plant?
What must be placed in an aquarium to maintain a steady supply of oxygen?
Which of the following activities DOES NOT cause a negative change in the environment?
All of the following organs are parts of the circulatory system EXCEPT _________.
Which of the following statements differentiates organs from tissues?
Cancer starts from cells that grow uncontrollably fast. They destroy tissues and organs. What does this say about the effects of diseased cells on the higher levels of organization in an organism?
Spores, when carried by the wind, can grow, or reproduce into a new organism called spore formation. Which of the following is reproduced by spore formation?
In binary fission, how does the daughter cells’ DNA compare to the parent cells’ DNA?