science consolidation 2.0

Question 1

What happens to the pressure of a gas when it is heated at constant volume?

Answer 1

It increases.

Question 2

In which two states are the particles randomly arranged?

Answer 2

Particles are randomly arranged in liquid and gas.

Question 3

In which state are the particles only able to vibrate in a fixed position?

Answer 3

Particles in a solid can only vibrate in an fixed position.

Question 4

Which state cannot flow from place to place?

Answer 4

Solids cannot flow from place to place.

Question 5

Particles in which state have no bonds?

Answer 5

Particles in gases have no bonds.

Question 6

Particles in which state sit in a regular pattern and are held together tightly by bonds?

Answer 6

Particles in solids sit in a regular pattern and are held together tightly by bonds.

Question 7

What happens to the pressure of a gas when it is heated at constant volume?

Answer 7

When the temperature of a gas is increased, its pressure increases.

Question 8

When 100 grams of water is boiled, what mass of steam is made?

Answer 8

100 grams of steam would be produced because of the conservation of mass.

Question 9

What is the definition of solid?

Answer 9

The substance that cannot be compressed.

Question 10

Is sand a solid?

Answer 10

Yes.

Question 11

what is the difference between mixture and solution?

Answer 11

Mixture contains two or more substances, which are not chemically combined. A solution contains two substances that are chemically mixed to form a new compound.

Question 12

Give 3 examples of a solution.

Answer 12

salt water, rubbing alcohol and sugar dissolved in water.

Question 13

What is the definition of Chromatography?

Answer 13

It is the method of separating colours.

Question 14

What is the definition of dissolve

Answer 14

When a solid mixes in with a liquid so it is no longer visible.

Question 15

what is definition of evaporation?

Answer 15

process of removing the liquid from a dissolved solid by warming the mixture until all the liquid turns to gas

Question 16

what is definition of filtration?

Answer 16

process of separating a mixture of an insoluble solid and liquid e.g sand and water.

Question 17

what is definition of fractional distillation?

Answer 17

process of separating a mixture of liquids.

Question 18

what is definition of insoluble?

Answer 18

Its mean when a solid cannot be dissolve.

Question 19

what is definition of a mixture?

Answer 19

Two or more substance not chemically joined.

Question 20

what is definition of opaque?

Answer 20

Not possible to see through.

Question 21

What do the animal cell and plant cell have in common?

Answer 21

They both have a nucleus.

Question 22

Which part of the cell controls what it does?

Answer 22

Nucleus.

Question 23

What is the Cytoplasm?

Answer 23

This is a jelly like stuff where most of the chemical reactions occur.

Question 24

What is the cell membrane?

Answer 24

This is a thin skin around the cell. It holds the cell together and also controls what goes in and out.

Question 25

What does the plant cell only have?

Answer 25

Chloroplasts.

Question 26

What is the chloroplasts?

Answer 26

These contain chlorophyll used for photosynthesis.

Question 27

What is the tissue?

Answer 27

A group of similar cells working together to perform a function.

Question 28

What is the cell wall?

Answer 28

A rigid outer coating made of cellulose, it gives support.

Question 29

Why is the nucleus called the control center of the cell?

Answer 29

This is because it is like the cells brain.

Question 30

Who were the cells discovered by?

Answer 30

They were observed by Hooke in the 1600s.

Question 31

What is reproduction?

Answer 31

The process of making another one of your species.

Question 32

Fill in the gaps: When a women has a baby inside her Uterus she is ..........

Answer 32

PREGNANT

Question 33

How does the baby get food and oxygen?

Answer 33

From the Umbilical cord.

Question 34

What are secondary sexual characteristics

Answer 34

big penis, body hair and deeper voice

Question 35

What are the male sex cells called?

Answer 35

Sperm cells.

Question 36

Where are the male sex cells made?

Answer 36

The male sex cells are made in the testes.

Question 37

What are the female sex cells called?

Answer 37

The female sex cells are called egg cells. Cilia are cells that line the gas exchange system.

Question 38

About how long does the menstrual cycle take?

Answer 38

The menstrual cycle takes about 28 days. After five days menstruation has normally stopped.

Question 39

What is ovulation?

Answer 39

Ovulation is the release of a mature egg cell. Fertilisation is when an egg and sperm join.

Question 40

What substance passes through the placenta to the baby?

Answer 40

Oxygen travels through the placenta to the baby

Question 41

What is the purpose of a spoiler on a car?

Answer 41

It creates down-force.

Question 42

What is g force?

Answer 42

A force acting on your body due to accelerations.

Question 43

What is the best way to measure force?

Answer 43

Use a force meter.

Question 44

What is the unit of force called?

Answer 44

Newton

Question 45

What can we say about the forces on an object that is not moving?

Answer 45

The forces are equal.

Question 46

What happens to the air resistance on a car as the car goes faster?

Answer 46

It increases.

Question 47

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

Answer 47

8n

Question 48

Is Gravity a contact force?

Answer 48

no

Question 49

What store of energy does friction always produce?

Answer 49

Friction always produces heat. Only sometimes does it produce gravitational potential energy.