Mixed Review

Alice conducted an experiment where she soaked six different kinds of seeds in water from a waterpark for 24 hours. Then she planted the seeds in soil at a depth of 1 cm. She used the same amount of water, light, and heat for each kind of seed.
Which step of the scientific method is this?

• Stating the problem

• Forming a hypothesis

• Conducting an experiment

• Drawing a conclusion

Kevin said, "If I grow five seedlings in red light, then the plants will grow faster than the five plants grown in white light."
Which step of the scientific method is this?

• Stating the problem

• Forming a hypothesis

• Conducting an experiment

• Drawing a  conclusion

Which statement is true?

• Oil is the most dense substance.

• Corn syrup is less dense than water.

• Oil is less dense than water.

• Oil and corn syrup have the same density but different masses.

Tags

NGSS.MS-PS1-2

How does friction affect speed?

• more friction decreases speed

• more friction increases speed

• less friction decreases speed

A combination of two or more different substances in which the substances keep their identities. 

• reaction

• mixture

• solution

• atom

Which state of matter has a fixed shape and volume and it's molecules move very slowly?

• Liquid

• Gas

• Solid

• Plasma

Tags

NGSS.MS-PS3-4

Why do sand dunes constantly change their appearance?

• Rain is the main reason sand dunes look different. It rains excessively in areas where sand dunes are present.

• Glaciers are constantly eroding the surface of sand dunes.

• Shifting temperatures cause sand dunes to freeze and thaw periodically.

• Sand dunes are present in areas that have lots of wind. Wind weathers and erodes these massive landforms.

Tags

NGSS.MS-ESS2-2

What landform is this?

• canyon

• valley

• delta

• mountain

Tags

NGSS.MS-ESS2-2

The Appalachian Mountains used to be pointed like the Rockies. What process lead to the roundness of their peaks?

• Weathering

• Deposition

• Lightning Strikes

• Mining of the rock

Tags

NGSS.MS-ESS2-2

Which of these is needed to create fossil fuels?

• Lots of pressure

• Heat from within the Earth

• Millions of years

• All of these

Tags

NGSS.MS-ESS3-1