Science

Question 1

Abiotic

Answer 1

Non living

Question 2

Biotic

Answer 2

Living

Question 3

Troposphere

Answer 3

• lowest region of the atmosphere
• weather occurs here
• temperature increases with altitude
• absorbs infrared light
• air is mixed well

Question 4

Stratosphere

Answer 4

• temperature increases with altitude

- ozone is present at 25km and absorbs deadly uv rays

Question 5

Mesosphere

Answer 5

• temperature decreases with altitude
• 50km to 90km
• layer where meteors burn up

Question 6

Thermosphere

Answer 6

• first layer exposed heat of the sun
• air is so thin that a small change in energy can cause a large temperature increase
• auroras occur here

Question 7

Exosphere

Answer 7

Region where atoms/molecules escape into space. Upper limit of atmosphere

Question 8

Apparent

Answer 8

A comparison between earth and stars

Question 9

Absolute

Answer 9

A comparison between stars and stars

Question 10

Doppler Effect

Answer 10

The wave frequency of of an object is faster when moving towards you than when moving away

Question 11

Red Shift

Answer 11

Moving away

Question 12

Blue shift

Answer 12

Moving

Question 13

Light year

Answer 13

The distance light can travel in one year (10trillonkm)

Question 14

Analogous Structure

Answer 14

Same purpose, different ancestor (butterfly and bat)

Question 15

Homologous structure

Answer 15

Same structure, different function (human arm and bat wing)

Question 16

Biodiversity

Answer 16

Factors that contribute to the selection variations, provides individuals with increased chance of survival over others

Question 17

Evolution

Answer 17

Change over time

Question 18

Species diversity

Answer 18

The number of different species within an ecosystem

Question 19

Allele

Answer 19

Alternative forms of a gene for a certain characteristic

Question 20

Meiosis

Answer 20

Parents cell results in four unique cells (haploid)

Question 21

Speciation

Answer 21

Formation of a new species

Question 22

Genetic drift

Answer 22

Changes due to events such as floods, fires

Question 23

Selective agents

Answer 23

Different biotic and abiotic agents that influence survival

Question 24

Population

Answer 24

Group of individuals, same species that can interbreed

Question 25

Natural selection

Answer 25

The unequal survival of organisms due to environmental factors that preserve favourable outcomes

Question 26

Gene pool

Answer 26

Common group of all genes present in a population

Question 27

Behavioural isolation

Answer 27

Capable of breeding but have different courtship rituals

Question 28

Geographical isolation

Answer 28

Separated by geographic Barrie's such as rivers, mountains

Question 29

Temporal isolation

Answer 29

2 or more species reproduce at the same time

Question 30

Incomplete dominance

Answer 30

The combination of alleles is expressed (red+blue=purple)

Question 31

Codominance

Answer 31

Both alleles are expressed fully

Question 32

Mitosis

Answer 32

Parent cells is replicated twice

Question 33

Autosomes

Answer 33

Non sex chromosomes

Question 34

Trisomy

Answer 34

Three copies of a chromosome are made instead of two

Question 35

Locus

Answer 35

Position occupied by a gene on a chromosome

Question 36

Male

Answer 36

XY

Question 37

Female

Answer 37

XX

Question 38

Karyotype

Answer 38

Chart displaying chromosomes

Question 39

What is in a nucleotide

Answer 39

Sugar, phosphate, base

Question 40

Transcription

Answer 40

DNA is unzipped and mRNA is created

Question 41

Translation

Answer 41

mRNA is read and amino acid chain is created, making a protein

Question 42

Somatic cells

Answer 42

Every sell other than sex 46 chromosomes 2n=diploid Mitosis

Question 43

Gametes

Answer 43

Sex cells Meiosis Haploid nxn=2n

Question 44

Chargaffs rule

Answer 44

A-T | G-C