Cells
This part of the cell is responsible for controlling the cell’s activities.
What is the nucleus?
This system is responsible for transporting blood around the body.
What is the circulatory system?
This type of rock forms when magma cools and solidifies.
What is igneous rock?
This resource is formed from the remains of ancient plants and animals over millions of years.
What are fossil fuels?
This element has the symbol 'Fe'.
What is iron?
This is a sign of a chemical change.
What is the formation of a new substance?
This is the type of variable that is changed in an experiment.
What is the independent variable?
This organelle is where photosynthesis occurs in plant cells.
What is the chloroplast?
This organ absorbs nutrients from digested food.
What is the small intestine?
This process breaks down rocks through physical and chemical means.
What is weathering?
This is an example of an unlimited renewable energy source.
What is sunlight?
Water (H2O) is an example of this.
A chemical change during respiration produces this.
What is energy?
This variable is the one that is measured in an experiment.
What is the dependent variable?
This is the process by which cells release energy from sugar.
What is respiration?
This organ system removes waste products from the body, such as urea.
What is the excretory system?
This type of rock can be formed from the compaction and cementation of sediments.
What is sedimentary rock?
Burning fossil fuels contributes to this environmental issue.
Compounds are made up of these, which are chemically bonded together.
What are elements?
This describes a physical change where a substance changes state, but no new substance is formed.
What is melting (or freezing, evaporating, etc.)?
This part of an experiment is kept the same to make comparisons.
What is a control variable?
This structure provides support and shape to plant cells.
What is the cell wall?
The lungs are connected to this system to help with oxygen exchange.
What is the respiratory system?
In a layer of sedimentary rock, the oldest layer is typically found in this position.
What is the base?
These are two disadvantages of using fossil fuels.
What are pollution and depletion of resources?
This describes the difference between a compound and a mixture.
What is that compounds are chemically bonded, while mixtures are not?
This type of reaction releases heat, such as in an exothermic reaction.
What is a chemical reaction?
The conclusion of an experiment must do this.