6th Grade Science
7th Grade Science
Scientific Processes
Atoms
Periodic Table
100

What are the differences between PROKARYOTES and EUKARYOTES?

Prokaryotes have NO nucleus and NO organelles; simpler and smaller (e.g. bacteria)

Eukaryotes have a nucleus and organelles, usually larger and more complex (e.g. plant and animals)

100

Define "evolution"

Change that occurs over time

100

What is the scientific unit for measuring LENGTH?

Meters (or centimeters)

100

Define "matter"

Anything that has mass and takes up space

100

What does the atomic number tell us about the atom?

The atomic number equals the number of protons (and also equals the number of electrons)

200

Organize the following from SMALLEST to LARGEST:

atom, cell, population, organ, organelle, organism

Atom, organelle, cell, organ, organism, population

200

Describe the structure of a DNA molecule

Double helix / twisted ladder, made up up of bases (A, T, C, G), double helix

200

What is the term for an "educated guess?"

HYPOTHESIS

200

What is an "element?"

substances made up of only one type of atom

200

Explain what "mass number" is

The mass number equals the number of protons plus the number of electrons

300

Which body system provides the body with oxygen and removes gases and wastes from the blood?

Respiratory system

300

Describe the process of photosynthesis?

Plants take sunlight + water + carbon dioxide --> oxygen + sugar

300

Define what a "theory" is in science.

A theory is an explanation supported by data/results from repeated experiments and tests

300

Describe the charge and location of protons

Protons are positively charged and located in the nucleus

300

Carbon has an atomic number 6, mass number 12, and is found in group 14/4A and period 2.

How many protons does carbon have? How many electrons does carbon have?

6 protons and 6 electrons

400
Describe ONE of Newton's Laws of Motion

1st: An object in motion will remain in motion and an object at rest will stay at rest unless acted upon by a force

2nd: F = m x a (force equals mass times acceleration) - a force is required to move an object

3rd: For every action, there is an equal and opposite reaction

400

What type of wave has the MOST ENERGY in the electromagnetic spectrum?

Options: gamma rays, infrared rays, microwaves, radio waves, ultraviolet rays, visible light, x-rays

Gamma rays

400

What are the steps to the scientific method?

1. Observe, 2. Predict (hypothesis), 3. Test/Experiment, 4. Collect Data, 5. Analyze, 6. Revise, Repeat, Report

400

Describe the charge and location of electrons

Electrons are negatively charged and found in clouds of different energy levels outside of the nucleus

400

Carbon has an atomic number 6, mass number 12, and is found in group 14/4A and period 2.

How many neutrons does carbon have?

6 neutrons

500

What TWO elements make up Earth's atmosphere?

Oxygen and nitrogen

500

What type of symbiotic relationship exists when both organisms help each other and are benefited by their relationship?

Options: commensalism, competition, mutualism parasitism, predation

MUTUALISM

500

Define "independent variable" and "dependent variable"

Independent variable is the manipulated variable that the scientist changes and tests (the cause)

Dependent variable is the responding variable that is the effect and is measured

500

Who came up with the first atomic theory?

John Dalton

500

Carbon has an atomic number 6, mass number 12, and is found in group 14/4A and period 2.

How many energy levels does carbon have? How many valence electrons?

2 energy levels and 4 valence electrons

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