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Science Year 8 Review Flashcards | StudBud
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Science Year 8 Review
Science Year 8 Review
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1
what do the arteries do
shoot arrows at a dart board
carry blood around
carry blood away from the heart
carry blood to heart
2
Asexual reproduction is..
reproduction leading to no effect at all
reproduction leading to variation only
reproduction leading to creates clones in offspring
reproduction leading to clones and variation
3
What are the 3 types of blood vessels?
capillaries, ventricles, valves
veins, valves, arteries
arteries, veins, capillaries
arteries, atriums, ventricles
4
Elastic potential energy is
stored energy in a stretched or squashed spring
stored energy in substances or chemicals
energy stored in an object which is above the ground.
energy inside the atoms that make up matter
5
When does the chemical breakdown of food begin?
When saliva is mixed with the food
When the food is swallowed
When the food enters the esophagus
When the teeth chew and grind the food
6
cardiologist
pertaining to the heart
slow heart
physician who studies and treats lung disease
physician who studies and treats heart disease
7
What is Cell theory?
Cells are the biggest nit of life.
Living things are ONE or MORE cells; the cell is the smallest uint of life.
8
What is the function of the excretory system?
Removes carbon dioxide from the blood.
Delivers oxygen to body tissues and organs.
Removes wastes, excess salt, and excess water from the blood
Allows the body to move.
9
What structure transports oxygenated blood away from the heart?
Inferior Vena Cava
Superior Vena Cava
Left Atrioventricular Valve
Aorta
10
What engineer is most likely to design roads, bridges, and highway overpasses?
Electrical
Civil
Chemical
Mechanical
11
Gravitational energy is a type of
potential energy
Kinetic energy
solar energy
biomass energy
12
What is the circulatory system?
The system that helps food travel through the body.
The system that circulates blood through the body
The system that helps your body digest.
The system that controls your breathing
13
Capillaries are....
sites of transfer of oxygen and other nutrients from blood
all of the above
Collect carbon dioxide, waste, and fluid for return to veins
One cell thick
14
What is respiration?
a process in living organisms involving production of energy
a process in living organisms involving getting rid of waste
a process in living organisms involving plants
a process in living organisms involving vegans
15
What does energy do?
All of the answers are true
It can heat something up
It can move things
It can change something's shape
16
What is the right definition of an Eyepiece from a microscope?
A piece to support your eye while looking in a microscope
The piece that rotates to raise and lower you eye
A piece that contains a lens to look through
17
Petrol contains chemical energy
False
True
18
What is nuclear energy?
The energy that holds the atomic electrons in place.
The energy that holds an atomic nucleus together.
Radiant energy given off by neon lights.
Energy from screams given from a victim of an atomic wedgie.
19
What are the organs of the Excretory System?
Kidneys, Lungs, Liver, and Skin
Lungs, Blood vessels, Kidneys, and small intestines
Kidneys
Skin, Liver, and Lungs
20
What is Engineering?
A design
A project
Solving a problem using knowledge and a process
Keep an open mind.
21
What is the function of the diaphragm?
all of the above
to put pressure on the lungs for exhalation
to help breathing
to relax to allow for inhalation
22
Why do we prefer cross pollination over self pollination of flowers?
we really don't care
then there is more genetic diversity
plants can't fertilize themselves
then there is less genetic diversity
23
What is self pollination?
Is fertilization in the same flower
Is pollination in the stem
Is pollination in the same flower
Is Cross pollination
24
The gestation period is the
length of pregnancy
time it takes the egg to mature
time during which an animal is in heat
period when an animal is fertile
25
What is the likely energy conversion involved before and after the man shoots the arrow?
Gravitational Potential Energy → Kinetic Energy
Chemical Potential Energy → Kinetic Energy
Kinetic Energy → Gravitational Potential Energy
Elastic Potential Energy → Kinetic Energy
26
Which organelle is known as the "control center" or "brain" of an animal cell?
lysosomes
cytoplasm
cell membrane
nucleus
27
What do the alveoli do?
Takes carbon dioxide from your blood and give oxygen
Takes oxygen from your blood and gives carbon dioxide
Breathy stuff
Soda
28
White blood cells...
are not a part of the immune system.
help the blood to clot.
help to fight infection.
contain haemoglobin.
29
This organelle provides the energy for the cell
Endoplasmatic Reticulumרשת אנדופלסמטית
cell membrane קרום התא
nucleus גרעין
mitochondria מיטוכונדריה
30
What is energy efficiency?
Schedule & control of the delivery of electric power
Financial analysis to determine present & future expenses
Duration of the operation of a device
Measure of how much work gotten per unit of energy used
31
what is nuclear energy?
energy from radiation
energy made by electrons
energy from bombs
energy in a nucleus
32
What type of energy conversion is happening here?
kinetic (wind) to mechanical (windmill, wheel)
mechanical (wind) to mechanical (wheel)
chemical (wind) to mechanical (windmill, wheel)
kinetic (wind) to kinetic (wheel)
33
What is the function of the cell membrane?
Controls the cells activities
A place where many chemical reactions happen
It controls substances entering and leaving the cell
It helps keep shape of the cell
34
What is the first step on the Engineering Design Process Loop?
Research the problem
Redesign
Identify the problem or need
Test and Modify Design
35
What did Robert Hooke do?
Invent the microscope.
Name and look at cells.
Make the cell theory.
None of these.
36
What is the likely energy conversion of identified in this image?
Chemical Potential Energy → Heat Energy + Kinetic Energy
Chemical Potential Energy → Heat Energy + Light Energy
Chemical Potential Energy → Kinetic Energy
Chemical Potential Energy → Heat Energy
37
Law of conservation of energy is?
States that energy can be created or destroyed
States that energy cannot be created or destroyed
States that energy can be created but not destroyed
States that energy cannot be created but destroyed
38
What Does Sexual Reproduction Mean?
2 Organisms Creating A Colon Of Each Other
2 Organisms Mixing Genes For A New Organism
1 Organism Creating A New Organism
Chromosomes
39
How does food travel along the oesophagus?
It just falls down
None of the above
The stomach pulls it down
Muscles squeeze it along in a process called peristalsis
40
Whats the Function of Veins
When the blood turns green
Helps the blood survive
To feed nutrients to the blood
When a blood vessel carries blood back to the heart
41
Where does photosynthesis occur?
Nucleus
Cytoplasm
Cell wall
Chloroplasts
42
What do the alveoli do?
a tube takes air to the lungs
air sacs that send oxygen to the blood
a muscle that allows us to breathe in and out
43
What is bio ethanol made from?
waste material.
An alcohol made from sugar and starch and starch crops.
Crude oil.
water.
44
Whats the definition of a mechanical engineer?
constuction and use of machines
designing, constuction, and the use of machines
designing and constuction
designing and use of machines
45
What is the role of the Nuclear Membrane?
seperates the nucleus from the cytoplasm
powerhouse of the cell
organelles that helps manufacture
storage area for the cell
46
What is the job of the Diaphragm
Where the air travels from the mouth to the lungs
They stick to microbes
The muscle that controls the lungs
Protects ypur body from bad microbes
47
Sound can travel through a vacuum
False
True
48
What function does the vacuole preform?
Makes Food
Breaks down food and releases energy
Controls life of the cell
Stores food, waste products and other cellular materials
49
Sunlight that is converted into usable energy is called _____ energy.
wind
tidal
geothermal
solar
50
What is a Pathogen?
A from of T-cell
A white blood cell
A animal that lives in china
A microorganism that causes disease
51
Which blood vessels carry blood to the heart?
Veins
Arteries
Capillaries
52
What is an example of gravitational potential energy?
A rock
Matches
Going upside down on a roller coaster
A slingshot
53
The capillaries are the smallest vessels in the body?
False
True
54
What is vegetative reproduction
sexual rep where the offspring grows apart from the animal
asexual rep where the offspring grows off of the parent
55
What is the oesophagus
A muscular tube that leads from the mouth to the stomach.
A muscular tube that leads from the mouth to the liver
A muscular tube that produces enzymes
A tube that leads from the mouth to the liver
56
What is the definition of potential energy?
Energy that can upload selfies to Snapchat
Energy that can be converted into atoms
Stored Energy
Energy in motion
57
What is the oesophagus made of?
Cartilage rings
Elastic muscles
Bones
Muscular tube
58
What is a sex cell?
Genetics
Sperm
Egg
Gamete
59
What is the function of the small intestine.
Breaking down carbohydrates
Produce bile
Absorption of nutrients
Absorb water
60
Spore
A spore is a wound
A animal
A spore is a company
A plant spore is a single plant cell that call be new plant
61
Pollination is ...
pollen tubules penetrating into the ovules.
pollen transferring from the anther to the stigma.
pollen fertilising the ovaries.
pollen inserting into the style.
62
An environmental engineer would help figure out how to build a new highway.
True
False
63
The energy conversion in the diagram below is
electrical to heat and light
light to electricial
heat and light
electrical to thermal
64
what is the function of the large intestine?
clean the body
create hormones that regulate blood sugar
eliminate indigestible material from the body
store nutrients
65
What are the job skills of a engineer?
count money, greet customers and be on time
go to university, use computers and make designs
take care of people, take temperature, and give shots
examine patients, prescribe medication, and
