Science Half Yearly

Question 1

Identify the parts of the Bunsen Burner.

Answer 1

Barrel, Collar, Air Hole, Base, Gas hose.

Question 2

What is an Independent Variable.

Answer 2

The variable that you change.

Question 3

What is a Dependent Variable.

Answer 3

What is measured.

Question 4

What is a controlled variable?

Answer 4

The variable that stays the same.

Question 5

What is Validity?

Answer 5

Testing what is set out to be tested. Keep variables constant.

Question 6

What is reliability?

Answer 6

When you repeat an experiment. If the results are constant then they are reliable.

Question 7

What is an aim?

Answer 7

When you repeat an experiment. If the results are constant then they are reliable.

Question 8

What is a method?

Answer 8

How to complete the experiment (use numbered steps)

Question 9

What is the conclusion?

Answer 9

Summarising the experiment. ( remember not to use personal language)

Question 10

Describe everyday situations when forces are balanced.

Answer 10

Standing, sitting, lying.

Question 11

Describe everyday situations when forces are unbalanced.

Answer 11

going down a slide, roller coaster, accelerating in a car, decelerating on a bike.

Question 12

Describe friction as a contact force.

Answer 12

Friction is when two surfaces rub against each other.

Question 13

How can you decrease friction?

Answer 13

By adding lubricant, wheels or changing the texture of the surface.

Question 14

How can you increase friction?

Answer 14

By changing the texture of the surface.

Question 15

Describe non-contact forces working in a field.

Answer 15

Non-contact forces work to pull together two objects.

Question 16

Describe gravity.

Answer 16

Gravity is when to objects with mass are attracted to each other. ( the smaller one will be attracted to the bigger one) (we are all attracted to the earth because it is the biggest thing in our atmosphere.)

Question 17

Define magnetism.

Answer 17

Magnetism is when two magnets are attracted to each other. It is a non-contact force.

Question 18

What metals are attracted to magnets?

Answer 18

Iron, nickel and cobalt.

Question 19

How are magnets attracted?

Answer 19

North and north: repel
South and south: repel
North and south: attract

Question 20

What are atoms made up of?

Answer 20

Protons, neutrons and electrons.

Question 21

What is in the middle of an atom?

Answer 21

A nucleus.

Question 22

How do atoms acquire and change their charge?

Answer 22

When atoms are placed in a force field atoms are attracted to each other and then exchange protons and neutrons and change their charge.

Question 23

According to the law of electrostatics explain how atoms react to each other.

Answer 23

Atoms with the same charge repel and atoms with different charge attract.

Question 24

What is an abiotic factor?

Answer 24

Anything in an environment that is not living

Question 25

Give an example of an abiotic factor.

Answer 25

stone, water, weather, sun.

Question 26

What is a biotic factor?

Answer 26

Anything in an environment that is living.

Question 27

Give an example of a biotic factor.

Answer 27

rabbit, fox, deer, tree, algae, fungi.

Question 28

What is a producer?

Answer 28

An organism that gets it's energy requirements from the sun using photosynthesis.

Question 29

What is a consumer?

Answer 29

An organism that gets it's energy requirements from eating other organisms.

Question 30

What is a decomposer?

Answer 30

An organism that gets it's energy requirements from eating dead matter.

Question 31

What axis is the dependent variable on?

Answer 31

The dependent variable is always on the y axis ( the vertical axis) and the independent variable is on the x axis.

Question 32

Do neutrons have charge?

Answer 32

No.

Question 33

What charge do protons have?

Answer 33

positive.

Question 34

Are nuetrons and protons in the nucleus?

Answer 34

Yes.

Question 35

What charge do electrons have?

Answer 35

Negative.

Question 36

Where are electrons?

Answer 36

Moving around outside of the nucleus.

Question 37

Do atoms in an object normally have a positive, negative or no charge?

Answer 37

no charge.

Question 38

If one material is rubbed against another what happens?

Answer 38

atoms lose charge and are not even.

Question 39

Name some insulators.

Answer 39

Plastic, rubber and wood.

Question 40

When one material is rubbed against another what does one lose?

Answer 40

electrons and then becomes positively charged where as the other one gains electrons and becomes negatively charged.