Reflection

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

Types of Reflection

There are two main types of reflection: regular reflection and diffuse reflection.

Regular Reflection

Regular reflection occurs when light or any other wave is reflected uniformly in a single direction, such as from a smooth surface like a mirror.

Diffuse Reflection

Diffuse reflection occurs when light or any other wave is reflected in many different directions, such as from a rough or irregular surface like a piece of paper or a wall.

Law of Reflection

The law of reflection states that the angle of incidence is equal to the angle of reflection. This means that the incoming angle of a wave is equal to the angle at which it is reflected.

Applications of Reflection

Reflection has various applications in everyday life and in science, including:

Using mirrors for reflection of light
Seeing your reflection in a mirror or shiny surface
Understanding how sound waves reflect off surfaces
Using reflection in radar and sonar systems for detecting objects

Study Guide

Here are some key points to remember about reflection:

Reflection is the change in direction of a wavefront at an interface between two different media.
There are two main types of reflection: regular and diffuse.
The law of reflection states that the angle of incidence is equal to the angle of reflection.
Reflection has various applications in everyday life and in science.

◂Science Worksheets and Study Guides Seventh Grade. Ecosystems, food chains and food webs

Study Guide

Ecosystems, food chains and food webs

Activity Lesson

Ecosystems, Food Chains & Food Webs

Worksheet/Answer key

Ecosystems, food chains and food webs

Worksheet/Answer key

Ecosystems, food chains and food webs

Worksheet/Answer key

Ecosystems, food chains and food webs

Vocabulary/Answer key

Ecosystems, food chains and food webs

Vocabulary/Answer key

Ecosystems, food chains and food webs

Vocabulary/Answer key

Ecosystems, food chains and food webs

Vocabulary/Answer key

Ecosystems, food chains and food webs

Vocabulary/Answer key

Ecosystems, food chains and food webs

The resources above cover the following skills:

LIFE SCIENCE

Ecosystems: Interactions, Energy, and Dynamics

Examine the cycling of matter between abiotic and biotic parts of ecosystems to explain the flow of energy and the conservation of matter.

Analyze and interpret data to provide evidence regarding how resource availability impacts individual organisms as well as populations of organisms within an ecosystem.

Construct an explanation to predict patterns of interactions in different ecosystems in terms of the relationships between and among organisms (e.g., competition, predation, mutualism, commensalism, parasitism).

Engage in argument to defend the effectiveness of a design solution that maintains biodiversity and ecosystem services (e.g., using scientific, economic, and social considerations regarding purifying water, recycling nutrients, preventing soil erosion).