Science 7 (A)

Scientists wanted to determine the levels of pollution that a fish could withstand. They placed fish in tanks with differing pollution levels and timed how long they could live under those conditions. What is the independent variable?

• Type of pollution

• Type of fish

• Level of pollution

• Amount of time before death of the fish

Scientists wanted to determine the levels of pollution that a fish could withstand. They placed fish in tanks with differing pollution levels and timed how long they could live under those conditions. What is the dependent variable?

• Type of pollution

• Type of fish

• Level of pollution

• Amount of time before death of the fish

A student is planning an experiment to find out the height from which he drops a ball affects how high the ball bounces. What is the independent variable?

• The ball used

• Force acting upon the ball

• Height that the ball bounces

• Height from which the ball was dropped

A student is planning an experiment to find out the height from which he drops a ball affects how high the ball bounces. What is the dependent variable?

• The ball used

• Force acting on the ball

• Height that the ball bounces

• Height from which the ball is dropped

A farmer applies different fertilizers to his cotton crops to see which will make his plants grow the highest. What is the independent variable?

• Type of fertilizer

• Different cotton crops

• Growth of plants

• Type of plant

A farmer applies different fertilizers to his cotton crops to see which will make his plants grow the highest. What is the dependent variable?

• Type of fertilizer

• Different cotton crops

• Growth of plant

• Type of plant

You want to figure out which brand of popcorn pops the most kernels so you can get the most value for your money. You test different brands of popcorn to see which bag pops the most popcorn kernels.

What is the independent variable in this research?

• Number of kernels popped

• Brand of microwave

• Brand of popcorn

• Value of money

You want to figure out which brand of microwave popcorn pops the most kernels so you can get the most value for your money. You test different brands of popcorn to see which bag pops the most popcorn kernels.

What is the dependent variable in this research?

• Number of kernels popped

• Brand of microwave

• Brand of popcorn

• Value of money