Resultaten

Outcomes

In this lesson you will learn about:

1. Rounding off numbers.
2. Estimating answers to calculations.

This YouTube video explores the concepts of approximations and estimations.

Outcomes:

• Design a diet and exercise regimen.
• Estimate the number of calories required for basic survival.
• Estimate the number of calories burned by exercise.
• Explain how heart health depends on diet and exercise.
• Explain how Body Mass Index (BMI) depends on weight and height.

There are many different processes and phenomena that emit electromagnetic radiation. Humans have taken advantage of many of these processes to develop technologies that use electromagnetic radiation.

The beauty of a coral reef, the warm radiance of sunshine, the sting of sunburn, the X-ray revealing a broken bone, even microwave popcorn—all are brought to us by electromagnetic waves. The list of the various types of electromagnetic waves, ranging from radio transmission waves to nuclear gamma-ray (γ-ray) emissions, is interesting in itself.

Even more intriguing is that all of these different phenomena are manifestations of the same thing—electromagnetic waves (see Figure 15.1). What are electromagnetic waves? How are they created, and how do they travel? How can we understand their widely varying properties? What is the relationship between electric and magnetic effects? These and other questions will be explored.

Photoelectric materials emit electrons when they absorb light of a high-enough frequency.

This online activity is a math game on rounding numbers. 

This is an online activity that provides you with various exercises on rounding whole numbers.

In this lesson you will learn about the following forms of renewable energy sources:

• Solar energy
• Water energy
• Wind energy
• Sea wave energy
• Geothermal energy