What is one important message from the Know the Facts presentation?

What is the main chemical in marijuana that causes a person to feel ‘high’?

Provide the SQL statement to answer the following question: for each continent, display the continent name, and the total number of countries in that continent

Consider the following example: Every morning, a user runs nearly one hundred lines of SQL statements as part of their job. They would like to automate this using a single statement.  Which of the following could enable this?

How should chemical waste be disposed of?

The pictogram that indicates a chemical is an oxidizer is

How should acids be diluted safely?

John used the EXPLAIN statement for a SQL query. He observes that the database is performing a “full table scan” (reading every single row) on a massive table instead of looking up specific rows. What is the most logical next step for John?

Return all unused chemicals to their original containers. 

It’s okay to pick up broken glass with your bare hands as long as the glass is placed in the trash.