Science Junior Cert

Question 1

What does a cell membrane do?

Answer 1

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

Question 2

What is Cytoplasm?

Answer 2

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

Question 3

What is the Nucleus?

Answer 3

It is what stores DNA.

Question 4

What is the vacuole

Answer 4

It is used for temporary storage of food and waste.

Question 5

What is the mitochondrion?

Answer 5

The mitochondrion carries out respiration within the cell.

Question 6

What is respiration?

Answer 6

The controlled release of energy from food.

Question 7

What are the function of Chloroplasts?

Answer 7

These contain chlorophyll which allows plants to go through photosynthesis

Question 8

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

Answer 8

Iodine.

Question 9

What is Photosynthesis?

Answer 9

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

Question 10

What is the stomata?

Answer 10

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

Question 11

How do you test for starch?

Answer 11

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

Question 12

What does plasma do?

Answer 12

Transports carbon and waste.

Question 13

What do white blood cells do?

Answer 13

Protect from disease

Question 14

What do red blood cells do?

Answer 14

Transport oxygen

Question 15

What do platelets do?

Answer 15

Help to clot blood and stop bleeding

Question 16

What are the 4 types of teeth?

Answer 16

Incisors, Canines, Pre-molars and Molars.

Question 17

How do you test for Carbon Dioxide?

Answer 17

It turns Limewater milky.

Question 18

What is menstruation?

Answer 18

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

Question 19

What is ovulation?

Answer 19

The release of an unfertilised egg from the ovary

Question 20

What is a habitat?

Answer 20

The place where an animal or plant lives

Question 21

What is a community (habitat terms)

Answer 21

A group of animals and plants that live together

Question 22

What is an ecosystem?

Answer 22

A group of plants and animals and their environment

Question 23

What is ecology?

Answer 23

The study of ecosystems

Question 24

What is Competition? (habitat terms)

Answer 24

The struggle between organisms for limited resources.

Question 25

What are producers?

Answer 25

Organisms that make their own food using sunlight by photosynthesis

Question 26

What are consumers?

Answer 26

Animals that obtain from by eating other organisms

Question 27

What are decomposers?

Answer 27

Organisms that feed on dead plants and animals

Question 28

What is a mixture?

Answer 28

A mixture is made of two or more different particles

Question 29

What is a compound?

Answer 29

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

Question 30

What are soluble substances

Answer 30

Able to dissolve in a liquid

Question 31

What is a solvent?

Answer 31

The liquid in which a substance dissolves

Question 32

What is a solute?

Answer 32

A substance that dissolves in a liquid

Question 33

What is a solution?

Answer 33

A mixture of a solute and a solvent

Question 34

What is a concentrated solution?

Answer 34

It contains a lot of solute in a little solvent

Question 35

What is a dilute solution?

Answer 35

It contains a little solute in a lot of solvent.

Question 36

What is Solubility?

Answer 36

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

Question 37

What is the atomic number?

Answer 37

The number of protons in the nucleus

Question 38

What is the mass number?

Answer 38

The number of combined protons and neutrons in its nucleus.

Question 39

What's a good way to remember acidic value?

Answer 39

The rainbow

Question 40

What are acids

Answer 40

Substances that turn blue litmus red

Question 41

What are bases

Answer 41

Substances that turn red litmus blue

Question 42

What is activation energy?

Answer 42

The minimum amount of energy for a reaction to take place

Question 43

What is a galaxy?

Answer 43

A collection of many millions of stars

Question 44

What is a dwarf planet?

Answer 44

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

Question 45

What is a satellite?

Answer 45

Any object that orbits a larger object or planet

Question 46

What is an asteroid?

Answer 46

A small rocky object that orbits a star

Question 47

What is a comet?

Answer 47

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

Question 48

What is the ozone layer?

Answer 48

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