Physical Science Review

Which of the following must be magnified to be counted?

• grains of rice

• blades of grass

• leaves on a branch

• fibers in a tissue

Which of the following can be seen without magnification?

• the parts of a cell

• crystals of sugar

• the petals of rose

• grains of pollen

What characteristic best describes what happens during a physical change?

• composition changes

• composition stays the same

• form stays the same

• mass is lost

Mixtures are made of substances that are ______.

• chemically changed and can be physically separated

• chemically changed and cannot be physically separated

• not chemically changed and can be physically separated

• not chemically changed and cannot be physically separated

lf sugar and sand are mixed, which of the following methods would separate the sugar and sand?

• melt the mixture in a pot

• pour the mixture through a sieve

• pour the mixture into water to dissolve the sugar

• They can not be separated

Malcolm left a cube of ice in a glass on a windowsill. ln about an hour, the ice changed into a clear substance that took on the shape of the lower part of the glass. Finally, after three days, there appeared to be nothing in the glass at all. What states of matter did the ice cube pass through?

• liquid then gas then solid

• solid then liquid then gas

• gas then liquid then solid

• solid then gas then liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Jerome wanted to make breakfast. First, he cracked several eggs into a bowl and stirred them briskly. Second, he grated low-fat cheese into the bowl.Third, he ground fresh black pepper into the bowl. After stirring the contents of the bowl, Jerome emptied it into a hot skillet and cooked the ingredients to perfection. Which of the steps is not a physical change?

• cracking eggs into a bowl

• grating the cheese

• grinding the black pepper

• cooking the eggs

Tags

NGSS.MS-PS1-4

Which of the following sentences describes a chemical change instead of a physical one?

• a copper bracelet gets twisted into a new shape.

• A copper bracelet gets melted into liquid copper.

• A copper bracelet turns green when it is worn.

• A copper bracelet is painted red.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If Adam rubs a balloon on his hair and holds it up to the wall, what will happen?

• The balloon will be attracted to the wall.

• The wall will repel the balloon.

• The balloon will pop.

• The balloon will float away.

Tags

NGSS.MS-PS2-5

Adam's experience with the balloon is an example of _ .

• static electricity

• conductivity

• insulation

• electric circuit

Tags

NGSS.MS-PS2-3