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LE Unit 1: Scientific Method and Characteristics of Life Flashcards | StudBud
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LE Unit 1: Scientific Method and Characteristics of Life
LE Unit 1: Scientific Method and Characteristics of Life
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1
What is an example of homeostasis?
random levels of oxygen
Maintaining acceptable blood sugar levels.
Allowing salt levels in the cell to be like, whatever.
Drinking so much water you get sick.
2
Which of these is a unicellular organism?
Fish
Amoeba
Ant
Worm
3
All of the following are characteristics of life, except
Ability to move
Ability to reproduce
Respond to stimuli
Maintain homeostasis
4
What is the function of a control group?
it is used to test the experimental variable
It is used for comparison with the experimental group
5
Graphing: The dependent variable
Goes on the x-axis
Goes on the y-axis
6
Which is a quantitative observation?
There are 8 trees in the picture
The truck was driving too fast
7
This is a fake pill given to the control group in an experiment
Tylenol
Placebo
Aspirin
Vitamin
8
Identify the objective lens
5
6
4
3
9
Which is an autotrophic organism?
flesh eating bacteria
banana slug
Redwood tree
narwhal
10
An experiment tests the effect of UV light on mold. The control group gets
UV light
no UV light
11
What should a scientist do if experimental data does not match their hypothesis?
adjust the data to support the hypothesis
eliminate data that does not support the hypothesis
explain why the hypothesis is incorrect & test a new hypothesis
12
Graphing: The independent variable
Goes on the y-axis
Goes on the x-axis
13
How many experimental variables should be changed in an experiment by a scientist
1
2
3
4
14
unicellular means
a group of cells that have no nucleus
an organism that is built from many cells and tissues
an organism that is made from only one cell
a group of organisms that live in water
15
If experimental results are valid, biologists in other laboratories should be able to
perform same experiment & get different results
repeat experiment & get same results
repeat with different variable & get same results
16
A student performs an experiment using 10 snails in each setup. How can the experiment be improved?
repeat the experiment with larger sample size
revise the hypothesis
17
Which microscope parts are used when carrying a microscope?
stage
base
arm
light source
18
When graphing independent variable (IV) and (DV)
IV is on the y axis, DV is on the x axis
IV and DV can go in either
IV is on the x axis, DV is on the y axis
What is an axis
19
This is the variable that the scientists changes in an experiment
independent variable
controlled variable
dependent variable
20
The table below shows the data collected in an experiment. How can it be improved?
test supplement on both groups for 5 weeks instead of 10
test only 1 group with 200 mg dose
test a 3rd group that does not receive supplement.
test 3rd group that gets 150 mg dose
21
This part of the microscope moves the stage up and down to focus.
B
A
C
D
22
Which is NOT a characteristic of life?
grow and develop
has DNA
ability to breathe
made up of cells
23
Which is true of a scientific THEORY?
Theories are the outcome of 1 hypothesis
Only theories that have been changed are accepted
Theories are NOT subject to change
All theories are subject to change and improvement
24
Homeostasis is the ability of the body to maintain a______ ________ ___________.
stable external environment
unbalanced external environment
stable internal environment
unbalanced internal environment
25
Which is an inference about the picture shown
A man is sitting on the sidewalk edge
the dog belongs to the driver of the car
There are 8 trees
There is a truck in the picture
