Science Review for March

The brightest stars in the night sky are

• closest to Earth
• furthest from Earth
• the biggest stars

Select the statement that explains the observable pattern of day and night.

• Day and night are caused by the Moon's revolution around Earth.

• Day and night are caused by Earth's revolution around the Sun.

• Day and night are caused by the brightening and dimming of the Sun.

• Day and night are caused by Earth's rotation on its axis.

Seasonal patterns are caused by

• Earth's orbit around the Sun
• Earth's rotation on its axis

Why can the students easily squeeze the bottle in Model 1, but not the bottle in Model 2?

• The particles are fixed in Model 1, but they are not fixed in Model 2.

• The particles take the shape of the bottle in Model 1, but not in Model 2.

• The particles move more slowly in Model 1 than they do in Model 2.

• The particles are farther apart in Model 1 than they are in Model 2.

Which statement is true about the models?

• Both models contain matter because air and water both have mass and take up space.

• Neither model contains matter because air and water do not have fixed particles.

• Only Model 1 contains matter because air has particles that are too small to be seen.

• Only Model 2 contains matter because water takes the shape of its container.

Which claim is true?

• The weight of matter changes when it is heated or cooled.

• The weight of matter equals zero when it can no longer be seen.

• The weight of matter changes when it becomes a different substance.

• The weight of matter stays the same during physical and chemical changes.

What is the purpose of recording the properties of the substances both before and after they are combined?

• to determine if substances can have color

• to determine which mixture is the heaviest

• to determine which mixture formed the fastest

• to determine if new substances have been made

Which result would provide evidence that one or more new substances have been created?

• The mixture is the same color as one of the original substances.

• The mixture takes up more space in the container than one of the original substances.

• The mixture is heavier than one of the original substances.

• The mixture has different properties than the original two substances.

When water changes from gas to liquid or liquid to gas, water molecules are not created or destroyed.

• true

• false

Water vapor in the air comes from liquid water that has _____________________.

• evaporated

• condensed

• precipitated