Free Printable FE SCIENCE YEAR 8

Worksheets

FE SCIENCE YEAR 8

Total questions: 30

Worksheet time: 25mins

Name

Class

Date

Which one of these is NOT a direct result of acid rain?

damage to monuments

dying fish

spread of disease

weakened trees

How is acid rain formed?

Carbon monoxide and carbon dioxide mix with water in the ocean.

Carbon dioxide and oxygen mix with water in the air.

Sulfur dioxide and carbon monoxide mix with lake water.

Sulfur dioxide and nitrogen oxide mix with water in the air.

Which of these is a MAJOR cause of acid rain?

spraying pesticides on crops

burning fossil fuels for energy

dumping sewage in river systems

using uranium to generate electricity

A mother goes to the doctor for a check up, and her doctor suggests to her to begin letting the fetus listen to music and reading to the fetus to help with brain development. At what stage of development is the fetus most likely in?

Weeks 1-2

Weeks 10-12

Weeks 18-20

Weeks 5-6

Twins that form from two separate eggs that are fertilized by two separate sperm are called

identical twins

triplets

quadruplets

fraternal twins

How does a developing fetus receive nutrients and oxygen?

It eats and breathes in the uterus.

It doesn't need nutrients and oxygen before it is born.

The umbilical cord transfers nutrients and oxygen from the placenta to the fetus.

The amnion contains all of the nutrients and oxygen the fetus needs.

These are fingerlike projections in the small intestine that nutrients pass through.

villi

absorbers

cilia

vascular

The contractions that push food down your oesophagus are known as?

Chemical Digestion

Mucus

Peristalsis

Flexion

The liver produces this substance that helps to break down fats.

Enzymes

Sugars

Carbohydrates

Bile

10.

What is a example of a abiotic factor?

Panda

Turtle

Laptop

weather

11.

A cotton sheet is ironed with a hot electric iron.

How is energy transferred through the metal base of the iron to the sheet?

by conduction only

by convection only

by radiation only

by convection and radiation only

12.

Thermal energy travels through spacefrom the Sun to the Earth. Space is a vacuum.

How is thermal energy transferred from the Sun to the Earth?

by conduction only

by convection only

by radiation only

by convection and radiation

13.

The diagram shows a vacuum flask used to keep liquid hot.

How does thermal energy pass through the vacuum?

conduction only

convection only

radiation

conduction and convection

14.

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard. Which row describes the temperature, and the direction of movement, of the air in the gap?

air temperature, cool. air direction, away from the heater

air temperature, cool. air direction, towards the heater

air temperature, warm. air direction, away from the heater

air temperature, warm. air direction, towards the heater

15.

A girl is outdoors. She warms her hands by holding them near a fire, as shown. How does the heat from the fire reach her hands?

conduction only

convection and conduction

convection and radiation

radiation only

16.

The energy of a sound wave is known as the sound's...

Frequency

Speed

Intensity

None of the above

17.

Humans perceive sound frequency as...

Pitch

Intensity

Loudness

None of the above

18.

Most people can hear sound waves with a frequency between...

20 to 50,000 Hz

10 to 15,000 Hz

20 to 20,000 Hz

20 to 50,000 Hz

19.

How does the state of matter (solid, liquid, gas) affect the rate at which sound travel?

It has no effect

In general, sound waves travel faster in denser substance

In general, sound waves travel slower in denser substance

None of the above

20.

A sound's intensity level is found by comparing it to quietest sound the human ear can hear, and in measured in...

Decibels

Hertz

m/s

21.

Which of the following is a chemical change?

Spraying perfume

Melting of ice

Burning a candle

Sublimation of dry ice

22.

Which of the following reactions does not involve oxygen?

Combustion of fossil fuels.

Respiration in cells.

Decomposition of sugar upon heating.

Oxidation of iron nails,

23.

Which of the following is true about the products formed when acid is reacted with a metal?

It produces salt, carbon dioxide and water.

It produces salt only.

It produces salt and hydrogen gas.

It is displacement reaction.

24.

Which of the following elements is not involved in the following word equation?
$Dilute\ hydrochloric\ acid\ +\ Magnesium\ \rightarrow$

$\ Magnesium\ Chloride\ +\ Hydrogen$

Sulfur

Chlorine

Magnesium

Hydrogen

25.

Dilute sulfuric acid $\left(H_2SO_4\right)$ + Magnesium $\left(Mg\right)$ $\rightarrow$ Magnesium sulfate $\left(MgSO_4\right)$ + Hydrogen $\left(H_2\right)$
Which of the following statements is true?

They mass of reactants and products are the same.

It is an oxidation reaction.

The equation is unbalanced.

The reaction does not produce bubbles.

26.

Nitric acid was added to magnesium metal. The gas produced is tested. What is the identity of the gas?

Oxygen

Carbon dioxide

Hydrogen

Water vapor

27.

What would most likely happen when there is not enough oxygen present during the combustion of carbon?

Carbon would burn with carbon dioxide from the air

Carbon would burn with moisture from the air

Carbon would not burn

Carbon monoxide would be produced

28.

Alexa wants to identify an unknown solution X by using litmus paper. Afterward, it is known that the blue litmus paper remains blue while the red litmus remains red litmus. Which of the following is the best estimates for the pH of the solution X?

pH 1

pH 4

pH 7

pH 10

29.

Air pollutants lead to difficulty in breathing. Which of the following is not a source of air pollutants?

Factories

Smoking

Acidic lakes

Traffic congestion in cities

30.

Two small iron bridges are built near a town. One of the bridges is built near the sea while the other is built in the city center. Which bridge will most likely rust first?

Neither of the bridge will rust.

Both bridges will rust a the same time.

The bridge near the sea will rust first.

The bridge in the countryside will rust first.

100 %

FE SCIENCE YEAR 8

Total questions: 30

Worksheet time: 25mins

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