what does the digestive system do?

helps digest food, breakdown nutrients, and remove waste

what elements make up DNA

Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus

what is Asexual reproduction?

one parent that makes an exact copy of itself

what is the law of conservation of matter?

matter cannot be created or destroyed, only change of form

what does the nervous system do?

controls all your body's activities

what are the different layers of the earth

lithosphere, asthenosphere, mesosphere, outer and inner core

what is the cell theory?

all living things are made of cells and come from cells

anything that has mass and takes up space

what is intrusive igneous rock?

rock that cools from magma below the earths surface

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

the genetic passing from one generation to the next

what is extrusive igneous rock?

rock that cools from magma above the earth's surface

what is convergent movement

when plates move forward and hit one another

definition of science

search for understanding the world through observation

what is a chemical change

when one or more substances are changed and cannot be undone

what does the membrane do?

controls what travels in and out of the cell

what is science chemistry?

the matter of dealing with substances and their properties

what is a mechanical wave?

a wave that needs a medium to travel through

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8th Grade Science CRT

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Questions 30

Answers

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

8th Grade Science CRT Flashcards | StudBud