Practique preguntas conocidas
Manténgase al día con sus preguntas pendientes
Completa 5 preguntas para habilitar la práctica
Exámenes
Examen: pon a prueba tus habilidades
Pon a prueba tus habilidades en el modo de examen
Aprenda nuevas preguntas
Popular en este curso
Aprende con fichas
Modos dinámicos
InteligenteMezcla inteligente de todos los modos
PersonalizadoUtilice la configuración para ponderar los modos dinámicos
Modo manual [beta]
El propietario del curso no ha habilitado el modo manual
Otros modos disponibles
elección múltipleModo de elección múltiple
Expresión oralResponde con voz
EscrituraModo de solo escritura
Chemistry by Leah - Marcador
Chemistry by Leah - Detalles
Niveles:
Preguntas:
172 preguntas
| 🇬🇧 | 🇬🇧 |
| Hypotheses need to be based on… | Observations |
| What is the scientific difference between a hypothesis and a theory? | The amount of evidence by which they are supported |
| Essentially, a hypothesis is a... | Conjecture |
| Scientific theories are supported by... | Substantial evidence |
| What is a Hazard? | Something that could potentially cause harm |
| To ensure the results of your investigation are reproducible, you can compare them by taking another set of readings using? | Different equipment |
| Which type of model uses words to describe the features of a system and how they interact | Descriptive |
| A mathematical model that needs a computer to carry out complex calculations defines a ___ model | Computational |
| ____ are used in the study of earthquakes | Computational models |
| If you add together all your data values and divide by the total number of values in the sample, what data will you be collecting? | The mean (average) |
| In a calculation the first significant figure of a number is… | The first digit that is not zero |
| In a calculation you should always round the numbers to the… | Lowest number of significant figures |
| The first significant figure in a number reads from… | Right to left |
| The trailing zeros in a whole number are… | Significant |
| The leading zeros in a decimal are… | Not significant |
| What do you call the slope in a linear graph? | The gradient |
| How do you calculate the gradient? | Gradient = change in y / change in x |
| Your mum | Your mum answer |
| The SI base unit of candela (cd) is used to measure the quantity of? | Luminous intensity |
| The SI base unit of mole (mol) is used to measure the quantity of? | Amount of substance |
| To convert from bigger units to smaller units do you divide or multiply by the conversion factor? | Multiply |
| To convert from smaller units to bigger units do you multiply or divide by the conversion factor? | Divide |
| Prefixes are intended to to create appropriately sized units to ensure the numbers are read much... | Easier |
| The multiplication factor for Tera is 10¹². Write the multiplication factor numerically. | 1 000 000 000 000 |
| The multiplication factor for Giga is 10⁹. Write the multiplication factor numerically. | 1 000 000 000 |
| The multiplication factor for Nano is 10⁻⁹. Write the multiplication factor numerically. | 0.000 000 001 |