Year 8 Chemistry, Biology And Physics

Question 1

What is the basic unit of life?

Answer 1

Cell

Question 2

True or False: All living organisms are made up of cells.

Answer 2

True

Question 3

What is the process by which plants make their food?

Answer 3

Photosynthesis

Question 4

Fill in the blank: The chemical formula for water is _____.

Answer 4

H2O

Question 5

What do we call a substance made of two or more elements that are chemically bonded?

Answer 5

Compound

Question 6

What type of bond involves the sharing of electron pairs between atoms?

Answer 6

Covalent bond

Question 7

What is the pH range of acids?

Answer 7

0 to 7

Question 8

What is the main gas produced by photosynthesis?

Answer 8

Oxygen

Question 9

Which part of the cell contains the genetic material?

Answer 9

Nucleus

Question 10

True or False: Prokaryotic cells have a nucleus.

Answer 10

False

Question 11

What is the term for the movement of water across a semi-permeable membrane?

Answer 11

Osmosis

Question 12

What is the primary energy source for living organisms?

Answer 12

ATP (Adenosine Triphosphate)

Question 13

Which organelle is responsible for energy production in the cell?

Answer 13

Mitochondria

Question 14

Fill in the blank: The chemical equation for photosynthesis is ____ + CO2 → C6H12O6 + O2.

Answer 14

H2O

Question 15

What do we call a group of similar cells that perform a specific function?

Answer 15

Tissue

Question 16

What is the process by which cells divide to form new cells?

Answer 16

Cell division

Question 17

What type of organism can produce its own food?

Answer 17

Autotroph

Question 18

What is the primary pigment used in photosynthesis?

Answer 18

Chlorophyll

Question 19

True or False: Viruses are considered living organisms.

Answer 19

False

Question 20

What is the term for a change in a species over time?

Answer 20

Evolution

Question 21

What is the smallest particle of an element that retains the properties of that element?

Answer 21

Atom

Question 22

What do we call the positively charged particles in an atom?

Answer 22

Protons

Question 23

What is the process by which DNA is copied?

Answer 23

Replication

Question 24

Fill in the blank: The four bases of DNA are adenine, thymine, cytosine, and _____.

Answer 24

Guanine

Question 25

What do we call the physical expression of a gene?

Answer 25

Phenotype

Question 26

What is the term for a segment of DNA that codes for a protein?

Answer 26

Gene

Question 27

What is the main function of ribosomes?

Answer 27

Protein synthesis

Question 28

True or False: All cells in an organism have the same DNA.

Answer 28

True

Question 29

What are the building blocks of proteins?

Answer 29

Amino acids

Question 30

What is the function of the cell membrane?

Answer 30

To control what enters and leaves the cell

Question 31

Fill in the blank: The three main types of rocks are igneous, sedimentary, and _____.

Answer 31

Metamorphic

Question 32

What do we call the process of breaking down food to release energy?

Answer 32

Cellular respiration

Question 33

What is the main component of the cell wall in plants?

Answer 33

Cellulose

Question 34

What is the term for the variety of life in the world or a particular habitat?

Answer 34

Biodiversity

Question 35

What is the primary function of chloroplasts?

Answer 35

To conduct photosynthesis

Question 36

True or False: The human body has 46 chromosomes.

Answer 36

True

Question 37

What is the process by which organisms maintain a stable internal environment?

Answer 37

Homeostasis

Question 38

What is the term for the study of living organisms?

Answer 38

Biology

Question 39

What do we call the chemical processes that occur within a living organism?

Answer 39

Metabolism

Question 40

What is the term for an organism's role in its environment?

Answer 40

Niche

Question 41

Fill in the blank: The three states of matter are solid, liquid, and _____.

Answer 41

Gas

Question 42

What is the term for a solution with a pH greater than 7?

Answer 42

Base

Question 43

What are the two main types of cells?

Answer 43

Prokaryotic and Eukaryotic

Question 44

What is the main function of the endoplasmic reticulum?

Answer 44

To synthesize proteins and lipids

Question 45

What do we call the process of converting a gas into a liquid?

Answer 45

Condensation

Question 46

True or False: Atoms of the same element have different numbers of protons.

Answer 46

False

Question 47

What is the term for a group of ecosystems that share similar climates and organisms?

Answer 47

Biome

Question 48

What is the primary function of the Golgi apparatus?

Answer 48

To modify, sort, and package proteins

Question 49

Fill in the blank: The two types of cellular respiration are aerobic and _____.

Answer 49

Anaerobic

Question 50

What is the chemical symbol for sodium?

Answer 50

Na

Question 51

What is the term for an inherited characteristic that increases an organism's chance of survival?

Answer 51

Adaptation

Question 52

What is the primary component of the plasma membrane?

Answer 52

Phospholipids

Question 53

True or False: All enzymes are proteins.

Answer 53

True

Question 54

What do we call the process of using sunlight to convert carbon dioxide and water into glucose?

Answer 54

Photosynthesis

Question 55

What is the term for the study of heredity?

Answer 55

Genetics

Question 56

What is the primary purpose of meiosis?

Answer 56

To produce gametes

Question 57

Fill in the blank: The four stages of the cell cycle are interphase, mitosis, cytokinesis, and _____.

Answer 57

G1 phase

Question 58

What is the term for the movement of substances across a cell membrane without the use of energy?

Answer 58

Passive transport

Question 59

What is the chemical formula for carbon dioxide?

Answer 59

CO2

Question 60

True or False: Bacteria are prokaryotic organisms.

Answer 60

True

Question 61

What is the term for the process of changing a liquid to a gas?

Answer 61

Evaporation

Question 62

What is the primary role of neurotransmitters?

Answer 62

To transmit signals in the nervous system

Question 63

What is the term for the interaction between organisms and their environment?

Answer 63

Ecology