Homework Practice

Printable assignment

Heat: Breezes, Clothing and Everyday Decisions

Breezes and Clothing

Question 1mcq

During daytime near the sea, why does sea breeze usually blow from sea to land?

A.Sea water heats faster than land and pushes air upward over the sea.

B.Air always moves from hotter place to hotter place.

C.Land heats faster, warm air over land rises, and cooler air from sea moves in.

D.The Moon pulls air only toward land in daytime.

Question 2mcq

At night, land breeze occurs because?

A.Sea cools instantly and sends warm air to land.

B.Air stops moving at night.

C.Conduction through sand pulls water upward.

D.Land cools faster than sea, so cooler air moves from land toward sea.

Question 3mcq

Why do we commonly wear woollen clothes in winter?

A.Wool traps air, and trapped air is a poor conductor of heat.

B.Wool conducts body heat away quickly.

C.Wool makes the body produce ice.

D.Wool lets cold air circulate freely.

Question 4mcq

Why are light-coloured clothes often preferred in summer?

A.They absorb all heat quickly.

B.They reflect more heat and absorb less radiation.

C.They conduct electricity better.

D.They stop sweating completely.

Question 5mcq

A student wears two thin sweaters instead of one thick sweater and feels warmer. Why?

A.Two sweaters create more sunlight.

B.The inner sweater becomes a conductor.

C.Air trapped between layers adds insulation.

D.The body temperature becomes

0^\circ C

Reading Data and Solving Problems

Question 6mcq

A thermometer shows

38^\circ C

for a child. What can be concluded carefully?

A.The child is definitely freezing.

B.The thermometer is measuring weight.

C.The child has normal body temperature for everyone.

D.The child may have a fever and should be monitored or checked.

Question 7mcq

A beaker of water is heated. The thermometer reads

25^\circ C

, then

45^\circ C

, then

70^\circ C

. What does the data show?

A.The water temperature is increasing with heating.

B.The water is losing heat continuously.

C.The thermometer is measuring volume only.

D.The water has become an insulator.

Question 8mcq

A student records

30^\circ C

29^\circ C

28^\circ C

for hot water left on a table. What is the best interpretation?

A.The water is being heated by a burner.

B.The water is cooling down by losing heat to the surroundings.

C.The room temperature must be

100^\circ C

D.The thermometer scale is showing length.

Question 9mcq

A metal spoon and a wooden spoon are left in hot soup. Which spoon feels hotter sooner, and why?

A.The wooden spoon, because wood is the best conductor.

B.Both feel exactly the same at every moment.

C.The metal spoon, because metal conducts heat faster.

D.Neither can absorb heat.

Question 10mcq

Assertion: A black umbrella may feel hotter in strong sunlight than a white umbrella. Reason: Dark colours absorb more radiant heat. Which option is correct?

A.Both are true, but the reason does not explain the assertion.

B.The assertion is true, but the reason is false.

C.The assertion is false, but the reason is true.

D.Both assertion and reason are true, and the reason explains the assertion.