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Science Revision > Form 2 Scince Revision > Flashcards

Form 2 Scince Revision Flashcards

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Biology 101 flashcards
1
Q

What is Aerobic respiration?

A

A chemical reaction inside cells, when oxygen is used to break down glucose and release energy

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2
Q

What is respiration?

A

A series of chemical reactions that take place in all living cells, in which energy released from glucose

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3
Q

What is the “waste” that you breath out called?

A

Carbon dioxide

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4
Q

What is a respiratory system?

A

The lungs and other organs that help oxygen to enter the body and carbon dioxide to leave it

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5
Q

What is gas exchange?

A

The movement of gases into and out of organisms

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6
Q

What is hemoglobin?

A

The red pigment in red blood cells

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7
Q

How does blood travel?

A

In a blood vessel

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8
Q

What is blood’s job?

A

Blood is a fluid responsible for transportation of substances around the body.

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9
Q

How is oxygen transported to each cell?

A

Oxygen is transported from from the aveoli (air sac) to each cell by medium called blood.

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10
Q

What is blood plasma?

A

blood plasma is a yellowish liquid in blood that transports dissolved substances.

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11
Q

What is blood plasma job?

A

To carry red and white blood cells around the body

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12
Q

What happens to your diaphragm and intercostal muscles when you breath in?

A

Contracts

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13
Q

What happens to diaphragm and intercoastal muscles when you breathe out?

A

Relaxes (pressure decreases)

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14
Q

What are pathogens?

A

Microorganisms that can cause diseases

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15
Q

What are white blood cells jobs?

A

Blood cells that help to protect against pathogens.

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16
Q

What are antibodies?

A

Chemicals produced by white blood cells, which kills pathogens

17
Q

What is a solvent?

A

The liquid in which substances can dissolve.

18
Q

What is a solute?

A

The substance that dissolves in a liquid.

19
Q

What is a solution?

A

The mixture formed when a solute is mixed with a solvent.

20
Q

What are substances that are easily dissolved in a solvent called?

A

Soluble

21
Q

What are substances that do not dissolve in a solvent called?

A

Insoluble

22
Q

What is a saturated solution?

A

A solution in which no more solid will dissolve.

23
Q

What is a concentrated solution?

A

A solution in which a large mass of solute is dissolved.

24
Q

What is a dilute solution?

A

A solution in which a small mass of solute is dissolved.

25
Q

What is solubility?

A

How soluble a substance is

26
Q

What are variables?

A

Factors that can be changed in an investigation.

27
Q

What is an independent variable?

A

The variable that you change.

28
Q

What is a dependent variable?

A

The variable that you measure

29
Q

What are control variables?

A

Variables that stay the same.

30
Q

What is paper chromatography?

A

A technique used to separate and analyze a mixture.

31
Q

What is chromatogram?

A

The result which show the separation of substances after carrying out chromatography.

32
Q

What does permanent mean?

A

Something that remains and does not change.

33
Q

What is force?

A

Force is a physical cause that can cause an object to change direction or shape.

34
Q

What is a balanced force?

A

Equal in size, opposite in direction ( the forces are all equal meaning it’s a balanced force.)

35
Q

What does opposite mean?

A

Acting against something

36
Q

What is direction?

A

A line or path taken by a moving object.

37
Q

How to find force?

A

Force = mass of object x acceleration of object

38
Q

What’s an unbalanced force?

A

Not equal in size and opposite in direction.

39
Q

What can a force cause an object to do?

A
  1. Change location.
  2. Slow down/accelerate.
  3. Change direction.
  4. Change in shape

Science Revision (2 decks)

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