Chemical Reactions
This is a clue that a chemical reaction may have occurred—bubbles, color change, or heat.
What is evidence of a chemical reaction?
This layer beneath Earth’s surface powers convection currents that move tectonic plates.
What is Earth's Mantle?
These x-structures in your cells contain genes that determine your traits.
What is chromosomes?
In natural selection, this type of trait increases an organism’s chance to survive and reproduce.
What is helpful/ advantageous traits?
This causes the seasons by affecting the angle of the sunlight hitting the Earth's surface.
What is Earth's Tilt?
During a chemical reaction, atoms are not lost or created but this happens to them.
What is atoms being rearranged?
When you add thermal energy to a solid, particles do this.
What is move faster and spread out?
Each person has two of these for every gene—one from each parent.
What are alleles?
Farmers or breeders use this process to pass on traits they want.
What is artificial selection?
The Moon’s gravity causes this rise and fall of ocean levels.
What is Tides?
These pure substances are made when atoms bond together in fixed ratios.
What are compounds?
This weather pattern is caused by the movement and interaction of different air masses.
What is a weather front or storm?
A change in DNA that may affect traits positively, negatively, or not at all.
What is a mutation?
These two factors influence how an organism grows.
What is genetics and environment?
Newton’s Third Law says for every action, this happens.
What is an equal and opposite reaction?
This type of substance is made from different materials mixed without chemical change.
What is a mixture?
The ocean helps regulate Earth’s climate by doing this with heat.
What is storing and moving it through currents?
These molecules are coded by genes and determine your traits.
What are proteins?
Over many generations, natural selection can lead to this.
What is evolution?
The speed of an object depends on this, along with the net force.
What is the object's mass?
Carbohydrates, proteins, and fats break down through chemical reactions to do this for cells.
What is to provide energy and support cell growth?
This process recycles Earth’s crust, building new land and creating volcanoes and mountains.
What is plate tectonics or convection cycling the crust?
This kind of reproduction mixes genes from two parents to create genetic variation.
What is sexual reproduction or meiosis?
Genetic variation in a population is important for this reason.
What is to help organisms to adapt to environmental changes?
The force that keeps planets in orbit and creates tides.
What is gravity?