1st Semester Science Vocabulary

Question 1

DNA

Answer 1

Stands for deoxyribonucleic acid. It’s the chemical that provides detailed instructions for cells

Question 2

dominant

Answer 2

Pescribes a stronger trait that will show up in an organism even if only one factor for it is present

Question 3

genes

Answer 3

Pieces of DNA that carry all the information passed from parents to their offspring

Question 4

nucleus

Answer 4

The control center of a cell that directs the cell’s activities

Question 5

organ

Answer 5

A structure that contains at least to types of tissue that work together to perform a specific function

Question 6

recessive

Answer 6

Describes a weaker trait that will show up in an organism only if no factor for the dominant trait is present

Question 7

sexual reproduction

Answer 7

Type of reproduction in which a sperm cell and an egg cell unite to form a single cell

Question 8

tissue

Answer 8

A group of specialized cells with the same structure and function

Question 9

adaptation

Answer 9

A feature of an organism that helps it survive in its surroundings

Question 10

classification

Answer 10

The sorting of things into groups of similar items

Question 11

fungus

Answer 11

An organism that has cell walls but does not have chloroplasts

Question 12

genus

Answer 12

A group of organisms that share major characteristics and are therefore closely related

Question 13

protist

Answer 13

A microscopic organism that may have characteristics of plants, animals, or fungi

Question 14

species

Answer 14

A single group of organisms that can reproduce among themselves

Question 15

angiosperm

Answer 15

A flowering vascular plant whose seeds are surrounded by a fruit

Question 16

asexual reproduction

Answer 16

Type of reproduction in which a new organism is formed without the joining of a sperm cell and an egg cell

Question 17

Who is the most handsome teacher at Satit Kaset IP?

Answer 17

Ajarn Michael

Question 18

conifer

Answer 18

A type of gymnosperm whose seeds develop inside a cone

Question 19

fern

Answer 19

A vascular plant that reproduces without seeds

Question 20

fruit

Answer 20

The ripened ovary of a flowering plant

Question 21

gravitropism

Answer 21

The growth response of plants to gravity

Question 22

gymnosperm

Answer 22

A vascular plant that produces cones

Question 23

moss

Answer 23

A small plant that does not vascular tissues or true roots, stems or leaves.

Question 24

nonvascular plant

Answer 24

A plant that lacks tissues for carrying water, food, and nutrients

Question 25

phloem

Answer 25

Plant tissue that carries food (sugar) from the laves to other cells

Question 26

phototropism

Answer 26

The growth response of plants to light

Question 27

pollination

Answer 27

The first step of angiosperm reproduction, during which pollen from an anther lands on a stigma of a flower of the same kind

Question 28

spore

Answer 28

A structure containing cells that can grow into a new plant without joining with other cells

Question 29

tropism

Answer 29

A growth response of a plant toward or away from something in its environment

Question 30

vascular plant

Answer 30

A plant that has transport tissues for carrying water, food, and nutrients to its cells

Question 31

xylem

Answer 31

Plant tissue that carries water and nutrients from the roots to the leaves

Question 32

biome

Answer 32

A region of the world, defined by its climate and by the types of plants and animals that live there.

Question 33

community

Answer 33

All the populations living in an ecosystem

Question 34

competition

Answer 34

The struggle among organisms for limited resource in an area

Question 35

consumer

Answer 35

An organism that eats other organisms

Question 36

diversity

Answer 36

The variety of species in an ecosystem

Question 37

ecosystem

Answer 37

An area where living and nonliving things interact with one another

Question 38

energy pyramid

Answer 38

A diagram that shows how energy is lost at each level in a food chain

Question 39

food chain

Answer 39

A sequence of connected produces and consumers

Question 40

food web

Answer 40

A group of connected food chains in an ecosystem

Question 41

habitat

Answer 41

The part of an ecosystem in which an organism lives

Question 42

host

Answer 42

The organism that a parasite lives on

Question 43

niche

Answer 43

An organism's role in an ecosystem

Question 44

parasite

Answer 44

An organism that benefits from its relationship with another organism while the other organism is hamred

Question 45

population

Answer 45

A group of organisms of the same species living together in an ecosystem

Question 46

producer

Answer 46

An organism that makes its own food

Question 47

symbiosis

Answer 47

A close relationship between organisms of different species in which one or both of the organisms benefits

Question 48

carbon cycle

Answer 48

The movement of carbon as solids, liquids, or gases through an ecosystem

Question 49

conservation

Answer 49

The careful use of resources so that they will last as long as possible

Question 50

endangered species

Answer 50

A species with so few individuals that it could die out

Question 51

extinction

Answer 51

The loss of an entire species

Question 52

natural resource

Answer 52

A material that occurs in nature that is essential or useful to people

Question 53

nitrogen cycle

Answer 53

The movement of nitrogen in different forms from living organisms to the nonliving part of the environment and back.

Question 54

recycle

Answer 54

To process used products into new products by using the materials again

Question 55

reuse

Answer 55

To use items again after their original use

Question 56

succession

Answer 56

The gradual long-term change of plant species in an ecosystem

Question 57

wetland

Answer 57

An area of land that is covered by water all or much of the time

Question 58

core

Answer 58

The layer of Earth that extends from Earths' center to the bottom of the mantle

Question 59

crust

Answer 59

The thin, outermost layer of Earth which includes both dry land and the ocean floor

Question 60

deposition

Answer 60

The dropping or settling of eroded materials

Question 61

earthquake

Answer 61

A vibration of Earth's crust, caused by the release of energy in a fault