What are some of the causes that disrupt the natural balance of the ecosystem?

removing predators by hunting

overpopulation of predators

breeding hybrid plants

removing prey by transplantation

ridding the soil of decomposers

Which can occur in a physical change? The mass can increase The particles can arrange in different ways The mass can decrease. The atoms can bond to different atoms.

Ions can have a positive or negative charge. a. True b. False

A wave has a wavelength of 8 mm and a frequency of 11 hertz. What is its speed? Your Answer:?

Which of these is not a part of the cardiovascular system?

What does gravitational potential energy depend on?

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes