7th grade science 5

Question 1

Crater

Answer 1

Depression formed by impact of meteorites or comets; the more craters in a region, the older the surface

Question 2

Lunar eclipse

Answer 2

Occurs during a full moon, when the Sun, Moon, and Earth line up in such a way that the Moon moves into Earth’s shadow

Question 3

Moon phases

Answer 3

Changing views of the moon as seen from Earth,

which are caused by the moons revolution around the earth

Question 4

Solar eclipse

Answer 4

Occurs during the new Moon, when the sun, the moon, and earth are lined up in a specific way and the earth moves into the moon’s shadow

Question 5

Asteroid

Answer 5

Small, rocky objects found in the astroid belt between the orbits of Jupiter and Mars

Question 6

Astronomical unit

Answer 6

Unit used to measure distance in the solar system one AU equals 150,000,000 km

Question 7

Comet

Answer 7

Space object made a rocky particles of ice that forms a tail when orbiting near the sun

Question 8

Nebula

Answer 8

Out of gas and dust particles and interstellar space

Question 9

Cell

Answer 9

The smallest unit of an organism that carries on the functions of life

Question 10

Homeostasis

Answer 10

The regulation of an organisms internal condition that keeps it alive despite changes in its environment

Question 11

Organism

Answer 11

Any living thing

Question 12

Binomial nomenclature

Answer 12

The two word scientific naming system used to name organisms

Question 13

Genus

Answer 13

A group of similar species

Question 14

Domain

Answer 14

The largest classification

Question 15

Phylogeny

Answer 15

History of how an organism has changed over time

Question 16

Cell membrane

Answer 16

The protective layer around the cell, which controls what happens between the cell and its environment

Question 17

Cell theory

Answer 17

The summary of ideas that all organisms are made out of one or more cells; the cell is the basic unit of organization; and all cells come from other cells that already exist

Question 18

Cell wall

Answer 18

A tough rigid outer covering that protects the cell and gives it shape

Question 19

Chloroplast

Answer 19

A green organelle that makes food in plant cells

Question 20

Cytoplasm

Answer 20

Gelatin like material inside every cell

Question 21

Endoplasmic reticulum

Answer 21

A series of folded membranes in which materials can be processed and move around inside the cell

Question 22

Golgi bodies

Answer 22

Stacks, flattened membrane that sort proteins and other cellular substances and package them into membrane-bound structures called vesicles

Question 23

Mitochondrion

Answer 23

An organelle where energy is released from breaking down food into carbon dioxide and water

Question 24

Nucleus

Answer 24

Usually the largest organelle in the cell that directs all cell activities

Question 25

Organ

Answer 25

A structure made up of two or more different types of tissues that work together

Question 26

Organ system

Answer 26

A group of organs that work together to perform a function

Question 27

Organelle

Answer 27

A structure within the cytoplasm of a eukaryotic cell

Question 28

Ribosome

Answer 28

A small structure where a cell makes its own proteins

Question 29

Tissue

Answer 29

A group of similar cells that work together to do one job