Scientific Investigation
The variable that is changed on purpose during an experiment.
What is the independent variable?
The control center of the cell.
What is the nucleus?
An organism that makes its own food
What is a producer?
The passing of traits from parents to offspring.
What is heredity?
The layer of Earth made of solid rock.
What is the crust?
The variable that is measured during an experiment.
What is the dependent variable?
The organ system responsible for transporting oxygen and nutrients throughout the body.
What is the circulatory system?
A relationship where both organisms benefit.
What is mutualism?
A segment of DNA that codes for a trait.
What is a gene?
The force that pulls objects toward Earth.
What is gravity?
A statement that can be tested through an experiment.
What is a hypothesis?
The process by which cells make energy from food.
What is cellular respiration?
The movement of energy from one organism to another.
What is a food chain?
Different forms of the same gene.
What are alleles?
The process by which water changes from liquid to gas.
What is evaporation?
A procedure used to solve problems and answer scientific questions.
What is the scientific method?
The organelle known as the “powerhouse of the cell.”
What is the mitochondria?
What would most likely happen if all producers disappeared from an ecosystem?
Consumers would eventually die because energy would not enter the food web.
Traits that are hidden when a dominant trait is present.
What are recessive traits?
The movement of tectonic plates can cause these natural events.
What are earthquakes and volcanoes?
Why is it important for scientists to repeat experiments?
To make sure results are reliable and accurate.
Explain how the respiratory and circulatory systems work together.
The respiratory system brings oxygen into the body, and the circulatory system transports oxygen through the blood to cells.
Name one human activity that negatively affects ecosystems and explain why.
Examples: pollution, deforestation, overfishing, climate change. These harm habitats and organisms.
If two heterozygous parents (Tt) have offspring, what is the probability of getting a recessive trait (tt)
What is 25%?
Explain why seasons occur on Earth.
Seasons occur because Earth is tilted on its axis as it revolves around the Sun.