What are three types of scientific investigations?

Runners often eat a big meal of pasta before a big race. Which molecules in the pasta increase the runner's energy? A. proteins and salts B. salts and carbohydrates C. lipids and proteins D. lipids and carbohydrates

Which statement most accurately compares earth crust and earth mantle

Is it true that once rock forms it never changes

a mass is measured as 6.2kg in one experiment and as 6.20kg in another. in what way do these two measurements differ?

What is the formula for time? (something like speed * distance=time?) ?

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum

What's the symbol for an ionized bromine atom?