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Unit 1 Review
Unit 1 Review
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Characteristics of life, scientific method
Flashcards
36 cards
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Practice quiz
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Host live
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Questions
36
Answers
1
How does reproduction help a species?
it gives them energy
it helps them to avoid extinction
it keeps them company
it helps them grow
2
Which of the following is a testable hypothesis?
Ice cream is delicious
Humans will someday land on Mars
A plant needs at least 5 hours of sunlight per day to grow
Roses are more beautiful than violets
3
Sexual and asexual are examples of
Dances
Reproduction
Universal genetic code
Cells
4
The smallest units of life are
cells
tissues
atoms
protons
5
When the whole population changes over time, what is it doing?
evolving
growing
reproducing
containing cells
6
Homeostasis is
an unstable internal condition
a stable internal condition
the way organisms store energy
maintained only by hormones
7
The ability to keep your insides the same, despite what is happening outside
Changes and evolves
Responds to stimuli
Maintain homeostasis
Grows and develops
8
Which of the following answers is a characteristic of all living things?
Warm blooded
has a brain
makes food
can respond to the environment
9
Ms. Buhmann made a hypothesis about a scientific question she has. What should she do next?
think of a different question
test her hypothesis
analyze her data
draw conclusions
10
What is the difference between a hypothesis and a theory?
hypotheses can't be proven, theories can
Theories have been confirmed through tests
a theory is a guess
Theory means "fact", hypothesis means "guess"
11
All of this originally comes from the sun and is necessary for organisms to function
Respond to the environment
Obtain and use energy
Reproduction
Universal genetic code
12
What is the first step in the scientific method?
hypothesis
research and ask questions
analyze data
perform experiment
13
Which of the following is an observation?
The apple was rotting because it was warm
The beaver was building his home
There are 24 desks in the classroom
The sewer lice were eating garbage
14
Which of the following is a quantitative observation?
she has blue eyes
she has soft hair
she is funny
she has three fingers
15
Using the 5 senses to help organisms survive
Ghosts
Life evolves and changes
Maintain homeostasis
Respond to environment
16
Frogs go from an egg to a tadpole over the course of their life
life evolves or changes
made of cells
maintain homeostasis
grow and develop
17
These are the building blocks of all living things
Maintain homeostasis
Made of cells
Life evolves or changes
Universal genetic code
18
Interpretations of observations using background knowledge
laws
inferences
variables
observations
19
Experiment to test which temperature makes eggs hatch. What would be the dependent variable?
Eggs Hatching
Temperature
Time
Eggs dying
20
What is the dependent variable on this graph?
Amount of fertilizer
There isn't one
Plant height
Time (2 weeks)
21
Name the independent variable in an experiment to see if altitude affects boiling point.
water
boiling point
container
altitude
22
Experiment to test which temperature makes eggs hatch. What would be the independent variable?
Eggs dying
Temperature
Time
Eggs Hatching
23
All organisms, from bacteria to animals, must
be able to move
be able to use oxygen
be able to clone themselves
be able to use energy
24
When species change for the better over long periods of time
That's how I beat Shaq
Grow and develop
Change and evolve
Maintain homeostasis
25
Experiment to test which soil makes plants grow higher. What would be the control?
Lots of soil
Sun
Water
No soil
26
When you test a hypothesis multiple times and the data doesn't support your prediction
Re-think your hypothesis
Conclude that your hypothesis cannot be proven
Change the data to support your prediciton
Run the experiment again until you get the results you want
27
What might cause a theory to change over time?
The discovery of new evidence
New but testable ideas
Changes in public opinion
New laws passed by the government
28
Order these steps: A) Recognizing a problem B) Testing a hypothesis; C) Drawing inferences
A B C
C B A
B C A
A C B
29
Which of these is a characteristic of a good hypothesis?
must be correct
must be able to disagree
must contain an opinion
must be able to be tested
30
Factors that change during an experiment
variables
inferences
observations
controls
31
Which of these is NOT a scientific question a scientist might try to answer?
Are tigers more beautiful than cheetahs?
Which type of goldfish lives the longest?
When do snakes shed their skin?
Why do cacti grow on the south side of the mountain?
32
Ms. Sharp is testing the effect of sunlight on her plants. Which of these is NOT a constant?
the type of soil in each plant
amount of water each plant gets
the amount of plant food
how close the plants are to the window
33
What is the importance of adding a control to an experiment?
To add complexity
To eliminate data
To add more data
To compare the effect of the independent variable
34
What must you do before you make a hypothesis?
Make observations
Run an experiment
Draw conclusions
Form a theory
35
After you perform an experiment, you must
do the experiment again
analyze data
research and ask questions
create a hypothesis
36
DNA makes up genes that determine specific characteristics about an organism
Life evolves or changes
Universal Genetic Code
Made of Cells
Grow and develop
