Chemistry Review
Shape: Fits the shape of the container (Not defined)
Volume: Defined
Kinetic Energy: Medium
What state of matter is this?
Liquid
What is the difference between energy transfer and energy transformation.
Energy Transfer occurs when energy is moved from one object to another
Energy Transformation occurs occurs when energy is changed from one form to another
Define commensalism in your own words.
One benefits, the other is neither benefited or harmed.
Two forces acting on an object are modeled in the diagram below. Which best describes the forces modeled by the diagram?
teacher will show picture
The forces are unbalanced; the net force is 10 N upward.
What is the mass per unit volume of a substance?
Density
If an object has a density of 1.3, will it sink or float in water?
Sink
What is the next force in the picture?
Teacher will show the picture.
1.5 N Left
Define an ecosystem.
A part of hierarchical organization that involves both the livining and non-living part of the environment.
An object with a density of 0.5g/cm3 is cut in half.
Each half of the object would _______________.
0.5g/cm3
What is a contact force that resists the sliding motion of two surfaces that are touching?
Friction
C6H12O6 is the symbol for sugar. Is this an element, compound, heterogeneous mixture, or homogeneous mixture?
Compound
List at least 2 contact forces.
Applied Force, Normal Force, and Friction
What are 2 abiotic factors that organisms compete for?
Air, water, soil, space
What type of energy remains the same throughout a roller coaster ride?
Mechanical Energy
What is an element that has physical and chemical properties of both metals and nonmetals?
Metalloid
What is silicon: a metal, nonmetal, metalloid, or rare earth element?
Metalloid
What is Newton's Third Law of Motion?
Every action has an equal and opposite reaction.
Eukaryotic have a nucleus and membrane-bound organelles. Prokayotes do not.
A student observed a flock of grackles. He noticed that they got the water they need from puddles and ponds. The student claimed that he observed an entire ecosystem. Is this an ecosystem?
Yes, it has nonliving and living matter.
What is stored energy due to the interactions between objects or particles?
Potential Energy
What are the four indicators of chemical change?
production of a gas, production of a precipitate, change in thermal energy, color change
What direction does the energy move in a transverse wave?
Perpendicular
What are the 3 parts of the cell theory?
1. All organisms are made of one or more cells.
2. All cells arise from pre-existing cells.
3. The cell is the basic unit of life.
A population of tortoises lives on an island. The tortoises eat the leaves of cactus plants that also grow on the island to survive. Half of the tortoises have long necks. Half have short necks.
The climate of the island changes so that cactus plants grow taller, and their leaves are higher off the ground. Which is most likely to happen over time?
The number of tortoises with long necks will increase because they have an advantage in the new environment.
What is a slight difference in an inherited trait among individual members of a species?
Variation