Which of the following is an example of a gas?

• Ice
  

• Water
  

• Steam

Answer explanation

Steam is water turned into gas form after being heated. Ice is a solid, and water is a liquid.

Water changes into steam when it is ______.

Answer explanation

Heat gives energy to water molecules, causing them to move faster and change into gas (steam).

Match the state of matter with its property:

• Spreads in all directions

• Liquid

• Keeps shape

• Gas

• Takes shape of container

• Solid

Answer explanation

Solids don’t change shape easily. Liquids flow and fit the container. Gases spread to fill the space they're in.

Arrange the steps of melting ice in order:

• Ice starts to turn into water.

• Heat is added to the ice.

• The temperature rises above 0°C.

Answer explanation

• First, heat is added (like leaving ice out or placing it in warm air). This causes the temperature to increase. When the temperature goes above 0°C, the melting point, the ice begins to melt. Eventually, the ice completely turns into liquid water.

When water freezes, it becomes (a)   .

• ice
• steam
• rain

Answer explanation

Freezing means removing heat. When water is frozen, it becomes solid ice.

Water is a ​ (a)   at room temperature.

• liquid
• solid
• gas

Answer explanation

At about 25°C (room temp), water is in liquid form—this is the normal temperature in most places.

Click on all the solid objects in the picture.

Answer explanation

Solids have a fixed shape and do not flow because:

• - They keep their shape unless something breaks them.

• - Their particles are tightly packed and don't move around freely.

• - Unlike liquids (e.g., milk in a jug) or gases (e.g., steam from the kettle), solids do not change shape easily.

Label the three states of matter shown in the picture.

a

b

c

Liquid

Solid

Gas

Answer explanation

A Lego block is a solid with a fixed shape, water is a flowing liquid, and the gas inside the balloon is a gas that floats upward.

Categorize into Solid, Liquid, or Gas:

Groups:

(a) Solid

,

(b) Liquid

,

(c) Gas

• carbon dioxide

• oxygen

• oil

• stone

• milk

• brick

Answer explanation

Each item is grouped by how it behaves physically (shape, flow, compressibility, etc)

Draw the 3 Forms of Water.

Answer explanation

Water changes when it is heated or cooled.

• Cold → Ice (Solid)

• Room temperature → Water (Liquid)

• Heat → Steam (Gas)