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Science Year 8 Rev > End Of Year > Flashcards

End Of Year Flashcards

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1
Q

What is potential difference?

A

The amount of push provided by the battery to a moving charge.

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2
Q

What is a current in a circuit?

A

A flow of an electron charge around a circuit

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3
Q

Name two differences between a series circuit and a parallel circuit.

A

Series circuits are one loop but parallel circuits have multiple branches, in a parallel circuit, the voltage is shared but in a series it ismt.

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4
Q

What is magnetism?

A

An invisible force that pushes or pulls magnetic materials.

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5
Q

What is an electromagnet?

A

Electromagnets are magnets powered by electricity from an electric current from a coil.

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6
Q

What is an induced magnet?

A

A material that becomes a magnet when placed in a magnetic field

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7
Q

Where are enzymes made in the body?

A

At the pancreas.

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8
Q

What is the function of the stomach

A

An organ thst contracts to churn food into a paste material.

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9
Q

How does a stimulant affect the body?

A

Speeds up the brain, nervous system and heart rate.

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10
Q

What is resistance in a circuit?

A

The measure of how difficult it is for a flow of charge to go through a component.

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11
Q

What so lipids do for your body?

A

They provide energy.

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12
Q

What do proteins do for your body?

A

They help grow and repair cells and tissue.

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13
Q

What do vitamins and minerals do for your body

A

Theyre essential in dmall amounts to keep you healthy.

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14
Q

What does water do for your body.

A

Needed in all cells and body fluids to keep hydrated.

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15
Q

What does fibre do for your body

A

Helps food to keep moving in the gut.

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16
Q

What do carbohydrates do for your body?

A

Theyre the main source of energy.

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17
Q

What is a solution?

A

A mixture of a solid or a gas with a liquid.

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18
Q

What is a solute?

A

It is the solid thet dissolves in a solution.

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19
Q

What is a solvent?

A

It is the liquid thst dissolves in solution.

20
Q

What does soluble mean?

A

If something is dissolvable.

21
Q

What is a solube?

A

It is a substance that can dissolve

22
Q

What is a insolube?

A

A substance that cannot dissolve.

23
Q

What is solubility?

A

It is how much a solute can dissolve in a volume of water?

24
Q

What is a saturated solution?

A

It is a solution where there is too much solute that no more csn dissolve.

25
Q

Why is the chemical tar in cigarretes harmful to the body?

A

The tar forms a stickey layer on top of the lungs, this may lead to lung cancer.

26
Q

How does nicotine in cigarettes affect the body?

A

It makes you addicted to it.

27
Q

How does carbon monoxide in cogarettes affect the body?

A

It makes it harder for oxygen to get into the organs and muscles.

28
Q

What is an enzyme?

A

A biological catalyst thst speeds up the process of digestion.

29
Q

What is the name of the group of f enzymes that break down protein?

A

Proteas.

30
Q

Define atom

A

The basic particle of the chemical element.

31
Q

Define element.

A

A substance made up of only one TYPE of atom

32
Q

What is a compound?

A

Two or more different elements chemically bonded together

33
Q

What is the name of the horizontal row of the periodic table?

A

Periods

34
Q

What is the name of the vertical row in the periodic table?

A

Groups.

35
Q

What is a mixture?

A

When different substances are mixed together but sre not chemically bonded together.

36
Q

What is filtrate?

A

Filtered liquid.

37
Q

What is distillation?

A

When a solution is heated up, when it starts to boil it is then cooled, condensed and collected.

38
Q

What is chromatography filtration?

A

When a piece of paper with a dot of ink is placed in water, the water climbs up the paper and as it does this, the ink moves up the paper until it is removed.

39
Q

How is static elecricity gemerated.

A

When two materials rub against each other.

40
Q

What is filtrate?

A

The liquid that passes through the filter paper

41
Q

What is residue?

A

-the solid material remaining after distillation.

42
Q

What are peoducers?

A

Green plants, they make glucose during photosynthesis. They are at the start pf the food chain.

43
Q

What is a balanced diet?

A

A meal that consisted of all the seven nutrients evenly.

44
Q

What are the 8 energy stores?

A

Chemical, kinetic, electrostatic, gravitational potential, elastic potential, nuclear, thermal and ,agnetic.

45
Q

Name the four energy transfers,

A

Mechanicalm by heating, radiation, electrically.

Science Year 8 Rev (1 decks)

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