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year 7 > SCIENCE-yearly > Flashcards

SCIENCE-yearly Flashcards

1
Q

What are the 3 parts of blood?

A

Plasma- clear, yellowish liquid
Red Blood cells - carry oxygen
White blood cells- fights diseases and plateletes & blood clots

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2
Q

What are abiotic factors?

A

Abiotic Factors are non living things

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3
Q

What is an organism?

A

A living thing

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4
Q

What is an ecosystem made of?

A

Made up of living and non living things that interact with each other

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5
Q

What is ecology?

A

The way which organisms interact with their environment

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6
Q

What are biotic factors

A

Biotic factors in an ecosystem are known as living things

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7
Q

What is a suspension?

A

When a solid separates from a liquid after a while

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8
Q

What’s Chromatography used for?

A

Used to separate mixtures of different colours using their subilities

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9
Q

What is a method that seperates substances by different boiling points?

A

Distillation

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10
Q

What happens when a solution becomes saturated?

A

The solution stops dissolving

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11
Q

What’s an adhesive force?

A

Attractive forces between particles of different substances

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12
Q

Definition of a solid?

A

Firm and stable in shape, Examples: rocks & metals

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13
Q

What can bacteria in food and water lead to…

A

Food poisoning and gastroenteritis and possibly pimples

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14
Q

What are micro organisms responsible for

A

The decay in food

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15
Q

What are bacteria and other micro organisms responsible for

A

Diseases such as tetanus, phemonia, meningococcal, meningitis, tooth decay and some cases of sore throat and ear infections

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16
Q

What are animals that feed on only plants called?

A

Herbivores and also first order consumers

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17
Q

What are animals that only feed on other animals called?

A

Carnivores

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18
Q

What are animals that feed on only plants called..

A

Omnivores

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19
Q

In the food chain animals are called…

A

consumers

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20
Q

In the food chain plants are called…

A

Producers

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21
Q

What is photosynthesis

A

A process that plants use to gather energy from the sun. The Suns energy allows the plants to convert carbon dioxide and water into sugars and oxygen

22
Q

What does density mean when talking about ecology?

A

Means the number of species living in an area.

23
Q

What is a habitat?

A

A habitat is a place where an organism lives

24
Q

Definition of distribution

A

The area inhabited by a plant or animal species

25
Q

What do abiotic factors include

A

Abiotic factors include

Temperature, soil type, rainfall patterns and amount of light available

26
Q

Definition of abundance

A

The number of a species living within an area

27
Q

What do biomass pyramids show?

A

They show food chains in ecosystems

28
Q

What is viscosity?

A

A measure of how much resistance a fluid offers against movement. Water has a low viscosity and cold honey has a high viscosity

29
Q

What allows some insects to walk on water?

A

Surface tension

30
Q

Liquid -> gas

A

Evaporating

31
Q

Gas -> solid

A

Deposition

32
Q

Gas -> liquid

A

Condensing

33
Q

Liquid -> solid

A

Freezing

34
Q

Solid -> liquid

A

Melting

35
Q

What determines the concentration?

A

The amount of solute dissolved in a solvent

36
Q

What does insoluble Mean?

A

It means that, that particular substance can’t dissolve in the other substance

37
Q

What does soluble mean?

A

It means that particular substance can dissolve in that particular solvent

38
Q

What are the solutions called when the water is the Solvent

A

Aqueous solutions

39
Q

What is the substance called when another is dissolved in it

A

A solvent

40
Q

What is a substance called that dissolves into another substance

A

A solute

41
Q

What is a mixture

A

A mixture is made up of 2 or more substances that have different properties eg. Sea water

42
Q

Solid -> gas

A

Sublimating

43
Q

What are colloids

A

Insoluble substances that remain spread out through another substance is called a colloid

44
Q

What is sediment

A

Sediment are particles that are at the bottom of the mixture

45
Q

What’s a cohesive force?

A

Attractive forces between similar particles in a substances

46
Q

What is centrifuging

A

A mixture can be separated by spinning it very quickly. This method is called centrifuging. The spin-dry cycle of a washing machine acts as a centrifuge and a filter. As it spins at high speed, the clothes are forced to the sides of the tub and the water passes out through the holes in the tub. The clothes cannot fit through the holes and so much of the water is removed from them.

47
Q

What is centrifuging

A

Mixtures that can seperate quickly by spinning in very fast

48
Q

To let heat pass through something

A

Conduct

49
Q

Pieces of info that are described in words

A

Qualitive data

50
Q

A change in which no new materials form

A

Physical change

51
Q

What Is heterogenous

A

Something that is not the same

52
Q

What is homogenous

A

Something that is the same

year 7 (8 decks)

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