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.Precipitation

B.Freezing only

C.Condensation

D.Evaporation

Question 2mcq

Which process removes carbon dioxide from the atmosphere?

A.Respiration

B.Volcanic emission

C.Photosynthesis

D.Burning coal

Question 3mcq

Why do most plants need nitrogen fixation?

A.Nitrogen fixation destroys soil nutrients.

B.They cannot directly use atmospheric nitrogen gas,

N_2

C.Nitrogen exists only in rocks.

D.They use only oxygen for proteins.

Question 4mcq

Which process releases oxygen into the atmosphere?

A.Photosynthesis

B.Respiration

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.Collecting rainwater

D.Burning fossil fuels

Section B: Application Practice

Question 6mcq

A good water cycle flow chart should include?

A.Only speed and velocity

B.Only photosynthesis

C.Evaporation, condensation, precipitation and collection.

D.Only formula writing

Question 7mcq

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

A.Colour of one surface only

B.Time of exposure to the lamp

C.Distance from the lamp for only one setup

D.Mass of one sample only while changing others randomly

Question 8mcq

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

A.Condensation of water vapour.

B.Nitrogen fixation

C.Combustion of oxygen

D.Melting of rocks

Question 9mcq

Which process returns carbon dioxide to the atmosphere?

A.Reflection by snow

B.Freezing of water

C.Nitrogen fixation only

D.Respiration by living organisms

Question 10mcq

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

A.Fish only

B.Flower petals

C.Nitrogen-fixing bacteria

D.Cloud droplets only