What is Dark Matter?
Dark matter is a type of matter that cannot be observed directly because it does not emit, absorb, or reflect light. It is different from ordinary matter, which includes atoms and molecules that make up everything we can see and touch.Importance of Dark Matter
Dark matter plays a crucial role in the structure and formation of the universe. It is believed to be the "glue" that holds galaxies together, as without its gravitational pull, galaxies would fly apart. Its presence can be inferred from the way galaxies rotate and how they interact with each other.Detection of Dark Matter
Scientists have been trying to detect dark matter for decades using various methods, such as direct and indirect detection experiments, as well as studying the effects of its gravitational pull on visible matter.Composition of the Universe
It is estimated that dark matter makes up about 27% of the universe, while ordinary matter (the matter we can see and interact with) accounts for only about 5%. The rest of the universe is made up of dark energy, which is another mysterious component that drives the acceleration of the universe's expansion.Study Guide
To understand dark matter, it is important to grasp the following key concepts:- The difference between dark matter and ordinary matter
- The gravitational influence of dark matter on galaxies
- Methods used to detect dark matter
- The composition of the universe, including the proportions of dark matter, ordinary matter, and dark energy
◂Science Worksheets and Study Guides Fourth Grade. Math in Science
Study Guide
Math in Science - 4th grade 
Worksheet/Answer key
Math in Science - 4th grade Worksheet/Answer key
Math in Science - 4th grade Worksheet/Answer key
Math in Science - 4th grade
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Science as Inquiry and Process (SA1, SA2, SA3)
The student develops an understanding of the processes of science by asking questions, predicting, observing, describing, measuring, classifying, making generalizations, inferring and communicating.