Homework Practice

Printable assignment

Earth System: Cycles, Human Impact and Inquiry

Section A: Core Ideas

Question 1mcq

Which process changes liquid water into water vapour?

A.Condensation

B.Precipitation

C.Evaporation

D.Freezing only

Question 2mcq

Which process removes carbon dioxide from the atmosphere?

A.Respiration

B.Burning coal

C.Volcanic emission

D.Photosynthesis

Question 3mcq

Why do most plants need nitrogen fixation?

A.They cannot directly use atmospheric nitrogen gas,

N_2

B.They use only oxygen for proteins.

C.Nitrogen exists only in rocks.

D.Nitrogen fixation destroys soil nutrients.

Question 4mcq

Which process releases oxygen into the atmosphere?

A.Respiration

B.Photosynthesis

C.Combustion

D.Rusting

Question 5mcq

Which human activity can increase carbon dioxide in the atmosphere?

A.Planting more trees only

B.Using a bicycle

C.Burning fossil fuels

D.Collecting rainwater

Section B: Application Practice

Question 6mcq

A good water cycle flow chart should include?

A.Only photosynthesis

B.Only formula writing

C.Only speed and velocity

D.Evaporation, condensation, precipitation and collection.

Question 7mcq

In a differential heating investigation, which variable should be kept the same for fair comparison?

A.Time of exposure to the lamp

B.Colour of one surface only

C.Mass of one sample only while changing others randomly

D.Distance from the lamp for only one setup

Question 8mcq

Which option correctly completes this statement: Cloud formation in the water cycle mainly involves?

A.Combustion of oxygen

B.Condensation of water vapour.

C.Nitrogen fixation

D.Melting of rocks

Question 9mcq

Which process returns carbon dioxide to the atmosphere?

A.Freezing of water

B.Nitrogen fixation only

C.Respiration by living organisms

D.Reflection by snow

Question 10mcq

Which organisms are important in converting atmospheric nitrogen into usable nitrogen compounds?

A.Fish only

B.Flower petals

C.Cloud droplets only

D.Nitrogen-fixing bacteria