Q: Which is true of scientific discoveries? ----

A: Sometimes scientific discoveries are made by accident, like the discovery of penicillin.

Q: A plant produces tiny plants around the edges of its leaves. When these tiny plants fall to the ground, they take root and become new plants. This process is an example of ----

A: asexual reproduction

Q: Rocks that contain fragments of bones, shells, and plant remains are most likely ----

A: sedimentary.

Q: Scientists use models that show the features of an atom. A scientist should use a model that ----
A: shows the details needed for a specific purpose