Chemistry
Elements which are shiny, conduct electricity and heat are called
metal
The smallest units of life that make up all living things are
cells
What is an exploding, high mass star called?
supernova
What is a PUSH or PULL of an object?
Force
What catastrophic event could cause plants to die due to salt water invasion?
Hurricane
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. What is the best evidence that a chemical reaction occurs when coal burns?
A new substance is produced
Plants use energy from sunlight, water, and carbon dioxide to produce sugar. Which structure is found only in plant cells and helps plants capture energy from sunlight?
chloroplast
Our sun and most stars are in what stage of their life cycle?
Main Sequence
If these boys are pulling with the same amount of force. What will happen?
They will not move at all.
Which of these stars is hottest?
Blue Star
What determines an element's identity?
protons
Multicellular, eukaryotic, and heterotrophic classify what type of organism?
Animal
What is the primary reason for the change in seasons on Earth?
The tilt of Earth's axis as it revolves around the Sun.
"For every action, there is an equal and opposite reaction."
Newton's 3rd Law
Ridged outer layer of a plant cell
cell wall
How many O's are in Al₂(SO₄)₃
12
What human activity is most likely to cause excessive growth of phytoplankton in the world’s oceans?
Water pollution
An (a) ? galaxy is characterized by a lack of a defined shape.
Irregular
If the wind is heading south with a force of 5 N, and a car is going north with force of 78936 N, what is the Net Force and Direction.
78931 N North
Overlapping food chains with different pathways for the flow of food energy in an ecosystem
Food Web
The equation for photosynthesis is shown.
6CO2 + 6H2O → C6H12O6 + 6O2
How do you know if this equation follows the Law of Conservation of Mass?
The number of atoms for each element in the reactants is equal to the number of atoms for each element in the products.
What are the levels of organization of an organism from LEAST to MOST complex?
cells-tissues-organs-systems-organism
What is a driving force behind the movement of the plates?
Convection Currents
If a person is picking up a book with the force of 50 N and the gravity is pushing down with 15 N, what is the net force?
35 N
In an ecosystem, snakes feed on frogs, which feed on mosquitoes. The use of a bug spray has decreased the number of mosquitoes. What will probably happen to the number of frogs and snakes?
Frogs will decrease, snakes will decrease