Molecules in Motion

Food coloring spreads out faster in hot water than in cold water. This is mainly because:

• The water molecules in hot water move more quickly
• The molecules in hot water are larger
• The food coloring molecules are small
• Hot water is less dense

Tags

NGSS.MS-PS1-4

When you bring two drops of water near each other and allow them to touch, they combine immediately and become one drop. This is mainly because:

• Water molecules are made of atoms
• Water molecules are attracted to each other
• Water molecules are magnetic
• Water is a liquid

Any sample of matter has mass and takes up space. The main reason for this is because...

• All matter is heavy
• Matter can be a gas
• Matter is made up of tiny particles that have mass and take up space
• The Earth is made of matter. 

If you put food coloring in room temperature water, the coloring spreads throughout the water. The water causes the color to spread mainly because:

• Water molecules are warm
• Water molecules are in motion
• Water is more dense than food coloring
• Food coloring molecules are small

Thermal energy is the measure of

• the motion of the atoms and molecules

• the shape of the atoms and molecules

• the size of the atoms and molecules

• the mass of the atoms and molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following describes one way that solids are different from liquids?

• Solids have weights and liquids do not

• solids take up space and liquids do not

• solids have a definite shape and liquids do not

• solids have a definite volume and liquids do not

Tags

NGSS.5-PS1-3

If you had a cup of soda with ice in it, which of the following explains the solid, liquid, and gas:

• the soda is the solid, the ice is the liquid, and the bubbles are the gas

• the ice is the solid, the bubbles are the liquid, and the soda is the gas

• the bubbles are the solids, the soda is the liquid, and the and the ice is the gas

• the ice is the solid, the cola is the liquid, and the bubbles are the gas

What happens as water boils?

• the molecules are destroyed

• the mass of the molecules decreases

• the molecules become separated from each other

• the molecules break down into hydrogen and oxygen atoms

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As molecule or particle motion increases, the space between molecules

• decreases
• increases
• stays the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As molecule motion decreases, the space between molecules

• does not change
• increases
• decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4