Sec 3 Challenge 2

Sec 3 Challenge 2

9th Grade

10 Qs

quiz-placeholder

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Sec 3 Challenge 2

Sec 3 Challenge 2

Assessment

Quiz

Science

9th Grade

Hard

Created by

JEM Belen

Used 1+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following would be found dissolved in the blood plasma of a human?

Glucose, urea, and hormones

Oxygen, urea, and starch

Carbon dioxide, hormones, and haemoglobin

Carbon dioxide, oxygen, and urea

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Some chemical compounds are purified by recrystallisation.

What can be used to test the purity of the crystals?

melting point

colour of crystals

size of crystals

solubility

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Why are passengers not allowed to stand up on the top deck of the double-decker bus?

They cannot be trusted to stand where the driver can’t see them.

They would raise the pressure exerted by the bus on the road.

They would increase the gravitational potential energy of the bus.

They would raise the centre of mass of the bus, causing it to become less stable.

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is a correct explanation of the effect of root hairs on absorption?

Provide a large surface area, maximising the rate of absorption of water and ions by osmosis

Provide a large surface area, maximising the rate of absorption of water by osmosis and ions by active transport

Increase the surface area, maximising the uptake of water by osmosis and ions by diffusion

Provide a surface area, increasing the rate of absorption of water and ions by active transport

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the electronic structure of an atom with a proton number 5 and a nucleon number 11?

1,8,2

2,8,1

2,3

3,2

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following energy sources produce no atmospheric pollution?

Wave power, solar cells, and geothermal power

Nuclear fuel, wave power, and solar cells

Fossil fuels, biofuels, and nuclear fuel

Biofuel, nuclear fuels and wave power

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following orders would be correct showing the size of structure from biggest to smallest?

Chromosome → red blood cell → stomach → gene → nucleus

Stomach → red blood cell → gene → chromosome

Stomach → red blood cell → nucleus → chromosome → gene

Gene → chromosome → red blood cell → stomach

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