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WorksheetsSemester Study Guide
Total questions: 37
Worksheet time: 19mins
The central region of an atom where its neutrons and protons are is its
nucleus
electron cloud
core
center
Electrons have a negative charge
true
false
____ are atoms with the same number of protons but different numbers of neutrons
electrons
protons
neutrons
isotopes
An inference is
The same as an observation
A logical interpretation of an observation
A statement
A way to avoid bias
3 Things to follow in class
no talking
no cellphones
raise your hand before speaking and getting out of seat
all of the above
When personal opinions and feelings influence scientific work OR when there is an error in the design of an experiment:
constraint
impact
rationale
bias
The statement “The Worm is 1 cm long” is called a(n)
Observation
Theory
Hypothesis
Inference
The water molecule is __________, because there is an uneven distribution of electrons within the molecule.
Weird
Polar
Thin
Cold
Water is made of 1 oxygen molecule and ____ hydrogen atoms
1
2
-2
10
19. What gives water many properties that are important to living things?
temperature
hydrogen bonds
density
specific heat
What is the function of nucleic acids?
Stores energy
Stores genetic information
Movement
Physical structure
Proteins are composed of
fatty acids
monosaccharides
nucleic acids
amino acids
What are the four elements that all life is made up of?
Hydrogen, Oxygen, Nitrogen and Carbon
Helium, Oxygen, Neon and Carbon
Hydrogen, Titanium, Carbon, Nitrogen
Oxygen, Chlorine, Iron, Nitrogen
What is the smallest unit of matter that cannot be broken down by chemical means?
Atom
Element
Ion
Isotope
All matter is made of:
a. energy
b. atoms
c. electrons
d. compounds
energy
atoms
electrons
compounds
The process in which tow cells from different parents unit to produce the first cell of a new organism is called
a. Homeostasis
b. Development
c. Asexual reproduction
Sexual reproduction
Homeostasis
Development
Asexual reproduction
Sexual reproduction
To be useful in science, a hypothesis must be
Measurable
Testable
Correct
Observable
A well-tested explanation that unifies many observations and hypotheses:
theory
law
rationale
impact
Electrons have this type of charge.
negative
positive
neutral
Weak attractive forces between uncharged molecules are called:
ionic forces
Van der Walls Forces
Covalent Forces
11. How many Amino Acids does our body use to make proteins?
20
10
6
2
A molecule with a partial positive charge on one side and a partial negative charge on the other side is called?
polar
non-polar
ion
charged molecule
9. What is the number of electrons that the element in this image contain?
14
7
18
15
A _______ bond occurs between shared pair(s) of electrons
Ionic
Electronic
Covalent
None of the Above
What does the nucleus consist of?
Protons + Electrons
Neutrons + Electrons
Atoms
Protons + Neutrons
Which one is NOT a biome?
stratosphere
temporate forest
ocean
savanna
The system that contains all living things on Earth.
Biosphere
Atmosphere
Hydrosphere
Geosphere
The biosphere includes plants and animals that live
on land
on land and in the water
on land, in water, and in the air
in water
Which of the following is an example of a human impact on the biosphere?
Hunting
Rain falling from the clouds
a volcano erupting
an earthquake
Are enzymes substrate specific?
YES!
NO.....
Water has these two physical properties that allow it to interact with other substances.
Cohesion
Adhesion
Non-polar
Ionically charged
A&B
Water is a universal solvent because it...
It freezes when it gets cold
floats when frozen
It can be found anywhere
Dissolves most substances
What do you call any substance that dissolves another substance?
Solvent
Height
Atoms
Oxygen
What is the chemical formula for water?
H20
h2o
H2O2
H2O
What is adhesion?
Water's ability to stick to itself
Water's ability to stick to other substances
The strength of the cohesion of all the water molecules combined
Tape, glue and other adhesives
What are abiotic factors?
All of the living things in an ecosystem
All of the non living things in an ecosystem
All of the living and nonliving things combined
A piece of a living thing
What is an ecosystem?
All of the living things in an ecosystem
All of the non living things in an ecosystem
All of the living and nonliving things combined
A piece of a living thing
