Quick Check Science 6

What is the first step in the scientific method?

• Forming a hypothesis

• Identifying a problem

• Conducting an experiment

• Drawing conclusions

Which variable is manipulated in an experiment?

• Constant

• Independent variable

• Control variable

• Dependent variable

What is a hypothesis?

• A summary of experimental results

• A proposed explanation for a phenomenon

• A group that receives no treatment

• A factor that remains unchanged

What is the role of a control group in an experiment?

• To receive the treatment

• To manipulate the independent variable

• To serve as a standard for comparison

• To measure the dependent variable

What is the smallest unit of an element?

• Element

• Atom

• Compound

• Molecule

What is a compound?

• A group of atoms bonded together

• A substance formed by chemically bonding two or more elements

• A process that leads to new substances

• A pure substance made of one type of atom

What is the conservation of mass?

• Mass is created in a chemical reaction

• Mass is destroyed in a chemical reaction

• Mass remains constant in a chemical reaction

• Mass changes form in a chemical reaction

What is kinetic energy?

• Energy that travels in waves

• Energy of motion

• Energy stored in an object due to its position

• Energy stored in chemical bonds

What is the formula for kinetic energy?

• KE = mg

• KE = ½mv^2

• KE = mgh

• KE = mv^2

What is an ecosystem?

• A variety of life in a habitat

• A nonliving component of an environment

• A natural environment for an organism

• A community of living organisms and their environment