The heart is an example of which level of organization within an organism?

O

cell

organ

tissue

organ system

O

O

What are some uses for graphite

Which cohesive forces are the strongest in water? A.) London dispersion forces B.) dipole interactions C.) hydrogen bonding interactions. D.) All intermolecular forces in water are equally strong.

Has an asteroid hit Earth in the past

Which is not one of the eight most common elements in Earth's continental crust? oxygen aluminum silicon carbon

In the late 1800s, the British scientist J. J. Thomson discovered that atoms were composed of positively-charged and negatively-charged particles. He proposed that these two types of particles were evenly mixed throughout the structure of the atom.

What size container do you need to hold 0.0459 mol of N2 gas at stp

What happens when two or more atoms react?

If cobalt metal is mixed with excess sulfur and heated strongly, a sulfide is produced that contains 55.06% cobalt by mass. Calculate the empirical formula of the sulfide.

Calcium's atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?

The doldrums region on Earth is created by an amount of heating from the Sun that results in the rising of warm, moist air, low air pressure, cloudiness, high humidity, and numerous forms of severe weather, such as thunderstorms.