[Free Registration/Login may be required to access all resource tools.] Seedless plants can reproduce asexually or sexually. Some seedless plants, like hornworts and liverworts, can reproduce asexually through fragmentation. When a small...

[Free Registration/Login may be required to access all resource tools.] There are two basic types of cells, prokaryotic cells and eukaryotic cells. The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells...

[Free Registration/Login may be required to access all resource tools.] The life cycle of a plant is very different from the life cycle of an animal. Humans are made entirely of diploid cells (cells with two sets of chromosomes). Our...

[Free Registration/Login may be required to access all resource tools.] A microscope is a tool used to make things that are too small to be seen by the human eye look bigger. Before microscopes were invented in 1595, the smallest things...

[Free Registration/Login may be required to access all resource tools.] Cells do eventually wear out. At that point, they need to be replaced. This is one reason that your cells divide. New cells that result after cells divide are also...

[Free Registration/Login may be required to access all resource tools.] Role of investigations in science and the steps of the scientific method.

[Free Registration/Login may be required to access all resource tools.] Explores the conservation of mass and energy in nuclear reactions and Einstein's equation.

[Free Registration/Login may be required to access all resource tools.] Explains Law of conservation of mass and why chemical equations must be balanced.

[Free Registration/Login may be required to access all resource tools.] Definition of chemical property and examples of the chemical properties of matter.

[Free Registration/Login may be required to access all resource tools.] How to calculate acceleration from force and mass, and force from mass and acceleration.

[Free Registration/Login may be required to access all resource tools.] Distinguishes between renewable and nonrenewable resources.

[Free Registration/Login may be required to access all resource tools.] Biases against women and people of color in science, and contributions of women and people of color in science.

[Free Registration/Login may be required to access all resource tools.] Covers the law of conservation of energy and how energy is conserved in chemical reactions.

[Free Registration/Login may be required to access all resource tools.] The history of plate tectonics past and future.

[Free Registration/Login may be required to access all resource tools.] Vision problems and how lenses can be used to correct them.

[Free Registration/Login may be required to access all resource tools.] Explores electrical conductors and insulators and the path of least resistance.

[Free Registration/Login may be required to access all resource tools.] Role of investigations in science and the steps of the scientific method.

[Free Registration/Login may be required to access all resource tools.] Discusses the intensity of sound and how it relates to loudness, the decibel levels of different sounds, and factors that affect sound intensity.

[Free Registration/Login may be required to access all resource tools.] How to use scientific measuring devices (metric ruler, triple beam balance, graduated cylinder).

[Free Registration/Login may be required to access all resource tools.] What happens during nuclear fission and what a nuclear chain reaction is. How nuclear fission can be used to produce energy and the pros and cons of using that energy.

[Free Registration/Login may be required to access all resource tools.] What nuclear fusion is and how and where it occurs. Using nuclear fusion to produce energy and its pros and cons.

[Free Registration/Login may be required to access all resource tools.] Covers the discovery of electromagnetism, how it relates to electricity, and Faraday's law.

[Free Registration/Login may be required to access all resource tools.] DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. DNA replication occurs during the S...

[Free Registration/Login may be required to access all resource tools.] What series and parallel circuits are and how they differ.