Black Holes

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it. Black holes are formed when massive stars collapse under their own gravity at the end of their life cycle.

Formation of Black Holes

When a massive star runs out of fuel, it can no longer support its own mass against the force of gravity. The core of the star collapses, and if the core is more than about 3 times the mass of the Sun, it can collapse into a black hole.

Characteristics of Black Holes

Black holes have three main properties: mass, charge, and spin. The mass of a black hole determines the strength of its gravitational pull. The charge and spin of a black hole also affect its behavior and properties.

Study Guide

What is a black hole?
How are black holes formed?
What are the main properties of black holes?
What determines the strength of a black hole's gravitational pull?
How do the charge and spin of a black hole affect its properties?

◂Science Worksheets and Study Guides Fourth Grade. Matter

Vocabulary/Answer key

Matter

Vocabulary/Answer key

Matter

The resources above cover the following skills:

Concepts of Physical Science (SB1, SB2, SB3, SB4)

The student demonstrates an understanding of the structure and properties of matter by identifying and comparing the characteristics of gases, liquids, and solids.

Concepts of Physical Science: A student should understand and be able to apply the concepts, models, theories, universal principles, and facts that explain the physical world. A student who meets the content standard should:

Develop an understanding of the interactions between matter and energy, including physical, chemical, and nuclear changes, and the effects of these interactions on physical systems.