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Science Junior Cert Flashcards

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Biology 101 flashcards
1
Q

What does a cell membrane do?

A

These hold the cell together, they also control what enters and exits the cell.

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2
Q

What is Cytoplasm?

A

This is a jelly-like fluid that suspends the other structures of the cell.

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3
Q

What is the Nucleus?

A

It is what stores DNA.

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4
Q

What is the vacuole

A

It is used for temporary storage of food and waste.

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5
Q

What is the mitochondrion?

A

The mitochondrion carries out respiration within the cell.

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6
Q

What is respiration?

A

The controlled release of energy from food.

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7
Q

What are the function of Chloroplasts?

A

These contain chlorophyll which allows plants to go through photosynthesis

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8
Q

What do you apply to an onion cell to see it through a microscope?

A

Iodine.

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9
Q

What is Photosynthesis?

A

Photosynthesis is the process by which green plants make their own food.

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10
Q

What is the stomata?

A

Tiny pore-like structures on the under-surface of the leaf.

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11
Q

How do you test for starch?

A

When a food product is covered in iodine, it will turn blue-black

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12
Q

What does plasma do?

A

Transports carbon and waste.

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13
Q

What do white blood cells do?

A

Protect from disease

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14
Q

What do red blood cells do?

A

Transport oxygen

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15
Q

What do platelets do?

A

Help to clot blood and stop bleeding

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16
Q

What are the 4 types of teeth?

A

Incisors, Canines, Pre-molars and Molars.

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17
Q

How do you test for Carbon Dioxide?

A

It turns Limewater milky.

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18
Q

What is menstruation?

A

The release of uterus lining, unfertilised egg and blood through the vagina.

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19
Q

What is ovulation?

A

The release of an unfertilised egg from the ovary

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20
Q

What is a habitat?

A

The place where an animal or plant lives

21
Q

What is a community (habitat terms)

A

A group of animals and plants that live together

22
Q

What is an ecosystem?

A

A group of plants and animals and their environment

23
Q

What is ecology?

A

The study of ecosystems

24
Q

What is Competition? (habitat terms)

A

The struggle between organisms for limited resources.

25
Q

What are producers?

A

Organisms that make their own food using sunlight by photosynthesis

26
Q

What are consumers?

A

Animals that obtain from by eating other organisms

27
Q

What are decomposers?

A

Organisms that feed on dead plants and animals

28
Q

What is a mixture?

A

A mixture is made of two or more different particles

29
Q

What is a compound?

A

A pure substance made up of 2 or more elements that are chemically combined

30
Q

What are soluble substances

A

Able to dissolve in a liquid

31
Q

What is a solvent?

A

The liquid in which a substance dissolves

32
Q

What is a solute?

A

A substance that dissolves in a liquid

33
Q

What is a solution?

A

A mixture of a solute and a solvent

34
Q

What is a concentrated solution?

A

It contains a lot of solute in a little solvent

35
Q

What is a dilute solution?

A

It contains a little solute in a lot of solvent.

36
Q

What is Solubility?

A

This is the measure of a substance to dissolve in another substance

37
Q

What is the atomic number?

A

The number of protons in the nucleus

38
Q

What is the mass number?

A

The number of combined protons and neutrons in its nucleus.

39
Q

What’s a good way to remember acidic value?

A

The rainbow

40
Q

What are acids

A

Substances that turn blue litmus red

41
Q

What are bases

A

Substances that turn red litmus blue

42
Q

What is activation energy?

A

The minimum amount of energy for a reaction to take place

43
Q

What is a galaxy?

A

A collection of many millions of stars

44
Q

What is a dwarf planet?

A

A round space object that circles a star but hasn’t cleared it’s own orbit

45
Q

What is a satellite?

A

Any object that orbits a larger object or planet

46
Q

What is an asteroid?

A

A small rocky object that orbits a star

47
Q

What is a comet?

A

A small object of frozen gas, ice, rock and dust that glows and produces a ball.

48
Q

What is the ozone layer?

A

A part of the atmosphere that protects earth by absorbing the sun’s harmful radiation

Science (1 decks)

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