G7 Term2 IS chapter 2.1

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In which of the following states can water exist?

Solid
Liquid
Gas
All of the above (correct)

Water can only change from solid to liquid when heated.

False (B)

What is the process called when ice turns into water?

melting

The transition from water to steam is known as __________.

boiling Signup and view all the answers

Match the states of water with their respective processes:

Ice = Melting Water = Evaporation/Boiling Steam = Condensation Water Vapor = Cooling/Condensing Signup and view all the answers

What percentage of Earth's surface is covered by water?

70% (B) Signup and view all the answers

The amount of water on Earth has decreased over time.

False (B) Signup and view all the answers

Name the three states of water.

solid (ice), liquid (water), gas (water vapor) Signup and view all the answers

Water exists in three states: solid (ice), liquid (water), and _____ (water vapor/steam).

gas Signup and view all the answers

Match the states of water with their corresponding forms:

Solid = Ice Liquid = Water Gas = Water vapor Signup and view all the answers

What happens to water when it is heated?

It evaporates into steam (B) Signup and view all the answers

Water can change from one state to another when it is heated or cooled.

True (A) Signup and view all the answers

Name one piece of equipment used in the experiment to measure temperature.

thermometer Signup and view all the answers

When water is placed in a freezer, it changes to ___ .

ice Signup and view all the answers

Match the following states of water with their corresponding conditions:

Liquid = Room temperature Ice = Below 0°C Steam = Above 100°C Water vapor = Gaseous state Signup and view all the answers

What temperature does ice begin to melt?

0°C (B) Signup and view all the answers

The boiling point of water is lower than the freezing point.

False (B) Signup and view all the answers

What energy change occurs during the freezing of water?

Energy is released to the surroundings. Signup and view all the answers

The process by which water changes from a liquid to a gas at any temperature is called __________.

evaporation Signup and view all the answers

During which process does water absorb energy?

Melting (C) Signup and view all the answers

Match the following water states with their respective temperatures:

Melting Point of Ice = 0°C Freezing Point of Water = 0°C Boiling Point of Water = 100°C Evaporation Temperature = Any Temperature Signup and view all the answers

Evaporation only occurs at high temperatures.

False (B) Signup and view all the answers

What is the primary difference between boiling and evaporation?

Boiling occurs at a fixed temperature, while evaporation can occur at any temperature. Signup and view all the answers

When does water vapor condense into liquid water?

When it cools and contacts a cold surface (A) Signup and view all the answers

Water evaporates at a fixed temperature.

False (B) Signup and view all the answers

What happens to water vapor when it cools down?

It condenses into liquid water. Signup and view all the answers

What process describes water turning into vapor due to the Sun's energy?

Evaporation (D) Signup and view all the answers

Condensation occurs when water vapor is heated and rises.

False (B) Signup and view all the answers

A wet road becomes dry because the water __________ to form water vapor.

evaporates Signup and view all the answers

Match the following processes with their corresponding changes in water state:

Melting = Ice to water Freezing = Water to ice Evaporation = Water to water vapor Condensation = Water vapor to water Signup and view all the answers

What natural phenomenon occurs when water droplets in clouds grow heavy enough to fall to the ground?

Precipitation Signup and view all the answers

The process by which clouds are moved to different locations by wind is known as __________.

Transportation Signup and view all the answers

Match the stages of the water cycle with their descriptions:

Evaporation = Water turns into vapor due to energy from the Sun Condensation = Water vapor cools and forms droplets Precipitation = Droplets fall to the ground as rain or snow Transportation = Clouds are moved by wind Signup and view all the answers

Which of the following statements about the water cycle is INCORRECT?

Water vapour changes to water during freezing. (B) Signup and view all the answers

Warm air carries water vapour downwards during the water cycle.

False (B) Signup and view all the answers

In which location will wet clothes dry more quickly: bathroom, balcony, or living room?

balcony Signup and view all the answers

As the upper sky is cooler, water vapour condenses to form _____ droplets.

water Signup and view all the answers

Match the following steps of the water cycle to their correct order:

1 = Energy from the Sun causes water to evaporate from oceans, rivers and land surfaces. 2 = Warm air carries water vapour upwards. 3 = The water droplets join to form clouds. 4 = As the upper sky is cooler, water vapour condenses to form water droplets. 5 = As water droplets in the clouds grow larger, they fall as rain. Signup and view all the answers

What factor does NOT contribute to an increase in the rate of evaporation?

Less airflow (B) Signup and view all the answers

The rate of evaporation decreases when the temperature is higher.

False (B) Signup and view all the answers

Which factor is most likely to increase the rate of evaporation?

Higher air movement (C) Signup and view all the answers

Evaporation can occur only at boiling temperatures.

False (B) Signup and view all the answers

What are two reasons why wet hands dry more quickly under a warm-air hand dryer?

Higher temperature promotes evaporation and airflow helps to remove water vapor. Signup and view all the answers

The rate of evaporation is higher when the humidity is __________.

lower Signup and view all the answers

What physical state change occurs during evaporation?

Liquid to gas Signup and view all the answers

Match the factors affecting evaporation with their effects:

Higher temperature = Increases evaporation Lower humidity = Increases evaporation More airflow = Increases evaporation Larger surface area = Increases evaporation Signup and view all the answers

The rate of evaporation is influenced by factors such as temperature, humidity, and __________.

air movement Signup and view all the answers

Match the following factors affecting evaporation with their impacts:

High temperature = Increases evaporation rate High humidity = Decreases evaporation rate Low air movement = Decreases evaporation rate High wind speed = Increases evaporation rate Signup and view all the answers

Water states

Water exists as solid (ice), liquid (water), and gas (water vapor).

Melting

The change of state from solid (ice) to liquid (water).