Over 99% of all organisms that have ever lived on Earth are now extinct. This statement indicates which? *
O Extinction is a natural part of life on Earth
O Extinction is very rare
O'The rate of extinction has increased since humans evolved
O The earth's environment is not good at supporting life

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

What type(s) of intermolecular forces are expected between ch3ch2cooh molecules? dipole forces, induced dipole forces, hydrogen bonding

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element