PS Unit 1 Review

Coco is curious how the amount he sleeps each night affects how fast he can run a mile.

What is the dependent variable?

• amount of sleep

• speed of mile

If I put out red and blue bird feeders in my backyard, then more birds will visit the red feeder because birds prefer the color red over blue.

What is the independent variable?

• color of bird feeder

• number of birds at feeder

Sally Science wants to know how different amounts of fertilizer affect the growth of plants. She thinks that the higher the amount of fertilizer, the taller the plants will grow. She buys 100 fern seeds. She gives 25 seeds no fertilizer, 25 seeds low fertilizer, 25 seeds medium fertilizer, and 25 seeds high fertilizer. She places the ferns on the same windowsill and waters them the same amount at 9am each day. After two weeks, Sally observes the plants and measures their height.

What should Sally conclude?

• The greater the amount of fertilizer, the taller the plant grows.

• The greater amount of fertilizer, the shorter the plant grows.

• Plants grow tallest with a medium amount of fertilizer.

• Plant heights are affected by another variable besides fertilizer that wasn’t tested.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Base your answer on the image.

The fish is in an oval and clear container. This is a

• qualitative observation

• quantitative observation

• inference

Base your answer on the image.

There are eight letters on the front window.

This is a

• qualitative observation

• quantitative observation

• inference

Base your answer on the image.

There are 3 animals seen in the image.

This is a

• qualitative observation

• quantitative observation

• inference

Base your answer on the image.

The cat was hit by a car.

This is a

• qualitative observation

• quantitative observation

• inference

Base your answer on the image.

The pet store’s address is 1985.

This is a

• qualitative observation

• quantitative observation

• inference

Which of the following best describes what we learned from the dinosaur footprints activity?

• The same set of information led to the same inferences among the class.

• Our inferences stayed the same as we uncovered more fossils.

• The best claims were based on emotions, not on evidence.

• Scientists interpret evidence in their own ways, resulting in different conclusions.

Tags

NGSS.MS-LS4-1

Which scientific tool could be used to measure the length of an object?

• triple beam balance

• termometer

• ruler

• graduated cylinder