Protons have a _______________ charge.

When the birth rate is higher than the death rate, the population's growth rate _______.

What type of organism would be at the top of the energy pyramid?

The top of the soil profile is mostly composed of ___________________________

Neutrons have a __________________ charge.

How can mixtures be separated?

The excretory system rids waste, such as _____________, which is stored in the bladder until ready for release.

Organisms that enter new habitat and causes a negative effect. Ex. kudzu and fire ants

What is responsible for the inheritance of a trait, like eye color or blood type in humans?

What type of change is a rusting pipe undergoing?

What is the function of the cell membrane?

Which cells have a membrane bound nucleus?

Cell organelle thats in charge of cellular respiration and is the powerhouse of the cell.

Molecules are atoms that are held together by ________________ bonds.

Which two systems work together to transport blood and oxygen through the body?

Radiation, chemical agents, and viruses can all cause what?

What type of change is a change in state, such as water freezing?

In a chemical reaction the mass of the reactants must ___________________ the mass of the products.

What is the best soil for growing plants?

What percent of energy is tranferred between levels of an energy pyramid?

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