Carbon, nitrogen, and water are recycled through ecosystems many times. Which one of these eventually breaks

down completely?

Which of these processes indicates that smelting copper is a chemical change? It involves melting copper to form liquid metal. It involves heating charcoal to high temperatures. It involves drawing copper into long wires.

The state of matter for an object which has a definite volume but not a definite shape is ... Solid state Liquid state Gaseous state

In which type of reaction do two or more substances combine to produce a single substance? (1) synthesis (2) decomposition (3) single replacement (4) double replacement

Which best explains why greg's hands get warm as he holds a bowl of hot soup? heat energy is created from the thermal energy in greg's hands. heat energy is absorbed by the soup from greg's hands. thermal energy from the soup moves to greg's hands.

How many O2 moles are needed to react with 12.5 mol of SO2

What is an ion (1 mark) what is the charge on a chloride ion (1 mark) what is an ionic bond (1 mark)

Why do northern lights appear in different colors? Because charged particles of solar wind ignite different gases in Earth's atmosphere Because electrons and protons of solar wind ignite the plasma present in the corona Because electrons and protons

Which organ system consists of the following levels of organization? kidney cells - - > kidney tissues - - > kidney A. excretory B. circulatory C. respiratory D. integumentary

Identify the product of radioactive decay and classify the given nuclear reactions accordingly.

If a 860. ml of linseed oil has a mass of 680 g, what is the density of the oil