Add to folder> Introducing muzic-ivan.info Folders! Find out how you can intelligently organize your Flashcards.
Use LEFT and RIGHT arrowhead keys to navigate between flashcards;
Use UP and also DOWN arrowhead keys to flip the card;
H to show hint;
A reads message to speech;
Which of the complying with statements around hypothesis is false?
A. A hypothesis have to be testable in a method that is replicable by others.
You are watching: Which of the following statements is not a hypothesis?
B. A hypothesis is an explacountry for a herbal phenomenon.
C. A hypothesis have to be developed when the outcome for its test is well-known.
D. A hypothesis is an educated guess about why something happens
Choose the true statement
A. A hypothesis constantly leads to a clinical concept.
B. A scientific concept summarizes a hypothesis that has actually been sustained through recurring testing.
C. To be called a hypothesis, an explanation should be tested by multiple independent researchers.
D. The theory is establiburned initially followed by the hypothesis.
The science that encounters the products of the world and also the materials that these products undergo.
The stuff of which the universe is created, the two features are it has mass and occupies space.
Ability to format new substances, lumber burning, rusting of steel, digestion of food, growth of grass in our yard.
See more: An Open Area Free Of Woods And Buildings Answer, An Open Area Free Of Woods And Buildings
Classify each as a chemical or physical change
A. Milk transforms sour
B. Wax is melted over a flame and them catches fire and burns
Substances that have actually the same complace no matter where we find them. They are made out of aspects and also therefore deserve to be damaged dvery own right into elements with chemical alters. Example, water.
Can be defined as somepoint that has actually variable composition. Ex, lumber is a mixture, wine is a mixture, coffee, and also groundwater.
Always has actually the same complace. Pure substances are either facets or compounds. Pure water is a compound. Groundwater is a mixture.
Contains regions that have actually different properties from those of various other areas. Ex, when we pour sand also into water, tright here will be a room that"s mainly water and also one that"s mainly sand also.
Is the same throughout. Ex, as soon as we pour salt right into water, all the areas of the mixture have actually the same properties.
Identify each as pure substance, homogenous mixture, or heterogeneous mixture.
B. Stream through gravel at the bottom
E. Copper metal
Is tright here a difference between a homogenous mixture of hydrogen and oxygen In a 2:1 ratio and a sample of water vapor?
Yes, a mixture of hydrogen gas and also oxygen is composed of 2 kinds of molecules. A sample of water vapor includes only 1 type of molecule, h2o. Even if there is 2 times as much hydrogen gas as oxygen gas in the sample, the molecules of h and also o2 are unique, whereas the 2h and also o atoms in water are connected(bonded).
Are all physical alters accompanied by chemical changes? Are all chemical changes accompanied by physical changes? Exsimple.
No. Physical changes are not necessarily accompanied by chemical transforms. However before chemical changes are always accompanied by physical changes.
Which of the complying with represents a chemical change?
A. Frying an egg
B. Diluting oarray juice
C. Sublimation of dry ice
D. Molding melted silver
"cdnAssetsUrl":"","site_dot_caption":"muzic-ivan.info","premium_user":false,"premium_set":false,"payreferer":"clone_set","payreferer_set_title":"chem test 1","payreferer_url":"/flashcards/copy/chem-test-1-6794154","isGuest":true,"ga_id":"UA-272909-1","facebook":"clientId":"363499237066029","version":"v12.0","language":"en_US"