I am in 8th grade and I want to start studying for the sat and I have a psat for my school in about 20 days. Could someone refer me to practice websites and resources I could use. (For reference I am practicing Algebra 1 and Chemistry for 8th grade at my school) Thank you!

What is the measure of ∠m? 81° 65° 53° 98° answer plz

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

What is the leading cause if water scarcity throughout much of the world