Grade 7 Science Three-Term Budget Of Work

Comprehensive flashcards covering the Grade 7 Science curriculum including chemistry, biology, physics, and earth science topics as outlined in the Three-Term Budget of Work.

Particle Model of Matter

The concept that all matter is made up of tiny particles, with each pure substance having its own kind of particles.

Unicellular

Organisms that consist of a single cell, such as bacteria.

Multicellular

Organisms that consist of many cells, such as humans.

Solute

The substance that is dissolved in a solvent to form a solution.

Solvent

The substance in which a solute is dissolved to form a solution.

Compound Microscope

A science instrument used to observe plant and animal cells and identify organelles like the nucleus and mitochondria.

Mitosis

A type of cell division specifically used for growth and repair.

Meiosis

A type of cell division by which genetic information is passed on to offspring from both parents through fertilization.

Trophic Levels

The levels of energy in a food pyramid used to describe the transfer of energy between organisms.

Balanced Forces

Forces acting on an object that do not cause changes in speed or direction, such as a man standing still or an object moving with constant velocity.

Unbalanced Forces

Forces that cause changes in an object's speed or direction of motion, such as freely falling fruit or an accelerating car.

Vector

A concept used to distinguish between speed and velocity by including direction.

Distance-time graphs

Visual tools used to represent uniform velocity and provide accurate predictions about motion.

Diffussion

The process described in activities where food coloring spreads in water at different temperatures due to particle motion.

Conduction

A process of heat transfer explained by the particle model that can be advantageous or disadvantageous.

Convection

The transfer of heat energy through the movement of particles in fluids, contributing to land and sea breezes.

Radiation

A method of heat transfer from Earth's external source of energy, the Sun.

Epicenter

The point on the Earth's surface directly above the focus of an earthquake.

Focus

The location where an earthquake begins or generates within the Earth.

Magnitude

A measure of the energy released by an earthquake which helps determine the damage or effects on communities.

Intensity

A measure used to describe the effects of an earthquake on people and structures.

ITCZ

The Intertropical Convergence Zone, a weather system influenced by solar energy.

Standard Units

Used for physical quantities to make accurate measurements during a scientific investigation.

Litmus Indicator

A tool used to identify solutions as acids, bases, or salts based on their reaction.