science revision

Question 1

What is the formula for calculating speed?

Answer 1

Speed = Distance / Time

Question 2

True or False: Water freezes at 0 degrees Celsius.

Answer 2

True

Question 3

Fill in the blank: The process by which plants make their own food is called __________.

Answer 3

photosynthesis

Question 4

What is the main gas that plants take in during photosynthesis?

Answer 4

Carbon dioxide

Question 5

Multiple Choice: Which of the following is a renewable energy source? A) Coal B) Oil C) Solar D) Natural Gas

Answer 5

C) Solar

Question 6

What is the basic unit of life?

Answer 6

Cell

Question 7

True or False: The Earth revolves around the Sun.

Answer 7

True

Question 8

What is the chemical symbol for water?

Answer 8

H2O

Question 9

Fill in the blank: The force that pulls objects toward each other is called __________.

Answer 9

gravity

Question 10

Multiple Choice: Which part of the plant is responsible for absorbing water? A) Leaves B) Roots C) Stem D) Flowers

Answer 10

B) Roots

Question 11

What is the process of changing a liquid into a gas called?

Answer 11

Evaporation

Question 12

True or False: All living things require oxygen to survive.

Answer 12

False

Question 13

What is the primary function of the respiratory system?

Answer 13

To exchange gases (oxygen and carbon dioxide) with the environment

Question 14

Fill in the blank: __________ is the force that opposes motion between two surfaces in contact.

Answer 14

Friction

Question 15

Multiple Choice: What type of rock is formed from cooled magma? A) Sedimentary B) Metamorphic C) Igneous D) Fossilized

Answer 15

C) Igneous

Question 16

What does DNA stand for?

Answer 16

Deoxyribonucleic Acid

Question 17

True or False: An ecosystem includes both living and non-living components.

Answer 17

True

Question 18

What are the three states of matter?

Answer 18

Solid, Liquid, Gas

Question 19

Fill in the blank: The __________ system is responsible for transporting nutrients and oxygen in the body.

Answer 19

circulatory

Question 20

Multiple Choice: Which of the following is not a part of the cell theory? A) All living things are made of cells B) Cells are the basic unit of life C) All cells come from pre-existing cells D) Cells can arise spontaneously

Answer 20

D) Cells can arise spontaneously

Question 21

What is the main source of energy for the Earth?

Answer 21

The Sun

Question 22

True or False: The pH scale measures how acidic or basic a substance is.

Answer 22

True

Question 23

What is the role of chlorophyll in plants?

Answer 23

To absorb light energy for photosynthesis

Question 24

Fill in the blank: __________ is the study of matter and its interactions.

Answer 24

Chemistry

Question 25

Multiple Choice: Which of the following is an example of a physical change? A) Burning wood B) Rusting iron C) Melting ice D) Baking a cake

Answer 25

C) Melting ice

Question 26

What is the term for the variety of different species in an ecosystem?

Answer 26

Biodiversity