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Worksheets8th Grade Science Review 1 (Embedded)
Total questions: 7
Worksheet time: 7mins
Name
Class
Date
1.
A student set up the experiment shown above to determine what color absorbs the most energy from sunlight. Which of the following would make this a better-designed experiment?
a)
Use larger thermometers.
b)
Use same-sized containers for each color.
c)
Use glass containers instead of metal containers.
d)
Place the containers in the shade instead of in direct sunlight.
2.
You have been asked to join a team of engineers that is working on a new pesticide. The prototype has been tested, and it works well on one of the pests it was designed for. What step would you suggest the group do next?
a)
Ask: Identifying and Researching a Need
b)
Imagine: Developing Possible Prototypes
c)
Create: Testing and Evaluating
d)
Improve: Modifying and Retesting the Solution
3.
After swimming in the ocean, Jorge sits in the sun to dry off. After a while, he notices that he has small white crystals on his skin. Analyze the explanations below as to their strengths and weaknesses based on this evidence. Which is the most reasonable explanation of what happened?
a)
The water evaporated and attracted dust to Jorge’s skin.
b)
The white crystals are dead skin cells that are being shed.
c)
Jorge has developed a rare skin disorder.
d)
Salt that is dissolved in the water remained on Jorge’s skin after the water evaporated.
4.
Which of the following is an unintended consequence of the cell phone?
a)
Cell phone rings can interrupt others.
b)
People can take phones in cars to communicate in emergencies.
c)
Business people can keep in better touch with their customers.
d)
Long-distance calling can be more affordable.
5.
Which factor is most likely to introduce bias or error into an experiment designed to determine which brand of bar soap kills bacteria most effectively?
a)
using different types of soap
b)
using different amounts of soap
c)
using the same amount of bacteria for each trial
d)
having the bacteria on identical surfaces
6.
Which of the following is an adaptive bioengineered product?
a)
liquid pesticide spray for plants
b)
f ertilizer that can be put in the soil for plants
c)
gene introduced into a plant that helps it control the pest when the pest tries to eat the plant
d)
pesticide dust for plants
7.
Hank wants to learn about the effect that different amounts of sunlight have on plants. Which of the following is the only variable that she should change?
a)
the type of plant
b)
the amount of light
c)
the volume of water
d)
the amount of nutrients
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