what is a chemical change

when one or more substances are changed and cannot be undone

what is convergent movement

when plates move forward and hit one another

anything that has mass and takes up space

what does the digestive system do?

helps digest food, breakdown nutrients, and remove waste

definition of science

search for understanding the world through observation

what is a mechanical wave?

a wave that needs a medium to travel through

what is intrusive igneous rock?

rock that cools from magma below the earths surface

what is extrusive igneous rock?

rock that cools from magma above the earth's surface

what is the cell theory?

all living things are made of cells and come from cells

what elements make up DNA

Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus

what does the membrane do?

controls what travels in and out of the cell

the genetic passing from one generation to the next

what is science chemistry?

the matter of dealing with substances and their properties

what is Asexual reproduction?

one parent that makes an exact copy of itself

what does the nervous system do?

controls all your body's activities

what is the law of conservation of matter?

matter cannot be created or destroyed, only change of form

what are the different layers of the earth

lithosphere, asthenosphere, mesosphere, outer and inner core

process of being moved by wind,water or other natural forces

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8th Grade Science CRT

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Questions 30

Answers

1
what is a chemical change
when you fold a paper
when a physical property is changed
when something loses potential energy
when one or more substances are changed and cannot be undone
2
what is convergent movement
when plates slide against one another
when plates move forward and hit one another
when plates move apart
when one plate moves
3
what is matter
anything that is nonliving
everything in outer space only
anything that is living
anything that has mass and takes up space
4
what is in the nucleus?
protons
neutrons
neutrons, electrons, and protons
neutrons and protons
5
what is divergent movement
plates not moving
plates moving towards
plates sliding
plates moving away
6
what does the digestive system do?
helps blood move throughout the body
sends nerves from the brain to parts of the body
fights diseases
helps digest food, breakdown nutrients, and remove waste
7
definition of science
politics
search for understanding the world through observation
the study of engineering
learning how to write
8
something that has a high density will...
sink
float
9
what is a mechanical wave?
a big wave
a wave with a low pitch
a wave with a high amplitude
a wave that needs a medium to travel through
10
what is intrusive igneous rock?
sediment that presses together to form new rocks
rock that cools above the earths surface
rock that cools from magma below the earths surface
lava
11
something with a low density will...
float
sink
12
what is extrusive igneous rock?
rock that cools from magma above the earth's surface
gravel
rock that is weathered down and pressed together
rock that cools from magma below the earth's surface
13
what is the cell theory?
only humans have cells and come from cells
all living things are made of cells and come from cells
nothing in the world is made up of cells
all non living things are made of cells and come from cells
14
what is the earth's core made of
magma
iron & nickel
dirt
steel
15
what is life science?
the study of living things
the study of the human body
the study of space
the study of chemicals
16
what elements make up DNA
Sulfur, Oxygen, Carbon Monoxide, Sodium,
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus
Hydrogen, Xeno, Oxygen, Phosphorus
Carbon, Sodium, Sulfur, Nitrogen, Rhenium
17
what does the membrane do?
does nothing
controls what travels in and out of the cell
uses photosynthesis to gather food
helps provide for the cell
18
what is amplitude?
what kind of sound something makes
how high or low of a sound a wave makes
a tool used too calculate the speed of wave
how much energy is in a wave?
19
what is heredity ?
the passing of exactly the same DNA through generations
the passing of friends
the exchange of phone numbers
the genetic passing from one generation to the next
20
what does a producer do?
creates DNA
helps other animals survive
creates food from light
does nothing
21
what is science chemistry?
studying human behavior
the study of rocks
the matter of dealing with substances and their properties
how two people interact with each other
22
what is Asexual reproduction?
two parents that make a copy with equal dna of both parents
3 parents
no parents
one parent that makes an exact copy of itself
23
what does the nervous system do?
to circulate blood through the body
to digest food
to make you smarter
controls all your body's activities
24
what is the law of conservation of matter?
matter can be created and destroyed
matter cannot be created or destroyed, only change of form
all densities are the same
matter only exists in space
25
name the two movements of the earth
conduction and convection
rotation and revolution
rotation and convergent
spinning and falling
26
what kind of charge does an electron and proton have?
proton - electron +
proton + electron +
proton + electron -
proton - electron -
27
# major branches of science
Life, Chemical, Nature
CHemical, Ecosystem, Physical
Physical, World, Space
Life, Earth, Physical
28
what kind of waves form the waves that allow you to hear music
longitudinal waves
transverse waves
sound waves
mechanical waves
29
what are the different layers of the earth
the atmosphere
lithosphere, asthenosphere, mesosphere, outer and inner core
stratosphere, lithosphere, inner core
exosphere, thermosphere, stratosphere, atmosphere
30
what is erosion
process of being moved by wind,water or other natural forces
process of being broken down by natural forces
riding an airplane
swimming in a lake

8th Grade Science CRT Flashcards | StudBud